(the ine on top) The drawing below shows similar triangles representing a boy and his shadow compared to a tree and its shadow
A.27.4
B.37.3
C.40.0
D.42.0

(on bottom) if the sun is at an angle of 30• from the horizontal and a tree casts a 15- meter shadow in ground which is closest to the height of the tree
A. 7.5
B. 8.7
C. 13.0
D 26.0

(the Ine On Top) The Drawing Below Shows Similar Triangles Representing A Boy And His Shadow Compared

Answers

Answer 1

The height of the tree is closest to 8.66 meters (option B).

What is angle of elevation?

Angle of elevation is the angle between a horizontal line of sight and an object above the line of sight, as measured from the observer's eye.

In other words, it is the angle formed between the observer's line of sight and the line drawn from the observer's eye to the object being observed, when the object is above the observer's eye level.

To solve this problem, we can use the property of similar triangles, which states that the ratios of corresponding sides of similar triangles are equal.

For the boy and his shadow, we have:

height of boy / length of boy's shadow = height of tree / length of tree's shadow

Substituting the values given, we get:

56 / 48 = height of tree / x, where x is the length of the tree's shadow

Solving for the height of the tree, we get:

height of tree = (56 / 48) * x

We are not given the length of the tree's shadow, but we can use the information given in the second part of the problem to find it.

For the tree and its shadow, we have:

height of tree / length of tree's shadow = tan(30)

Substituting the value of the length of the tree's shadow as 15 meters and solving for the height of the tree, we get:

height of tree = 15 * tan(30)

height of tree ≈ 8.66 meters

To know more about property of similar triangles visit:

https://brainly.com/question/30857022

#SPJ1


Related Questions

In the year 1985, a house was valued at $108,000. By the year 2005, the value had appreciated to $148,000. What was the annual growth rate percentage between 1985 and 2005? Assume that the value continued
to grow by the same percentage. What was the value of the house in the year 2010?​

Answers

Answer:

To find the annual growth rate percentage, we can use the formula:

annual growth rate = [(final value / initial value)^(1/number of years)] - 1

where "final value" is the value in the ending year, "initial value" is the value in the starting year, and "number of years" is the total number of years between the starting and ending years.

Using the given values, we have:

annual growth rate = [(148,000 / 108,000)^(1/20)] - 1

= 0.0226 or 2.26%

So the house appreciated at an annual growth rate of 2.26%.

To find the value of the house in 2010, we can use the same growth rate to project the value from 2005 to 2010:

value in 2010 = 148,000 * (1 + 0.0226)^5

= $175,465.11 (rounded to the nearest cent)

Therefore, the value of the house in the year 2010 was $175,465.11.

Suppose Set A contains 98 elements and Set B contains 93 elements. If Sets A and B have 35 elements in common, what is the total number of elements in either Set A or Set B.

Answers

The total number of elements in either Set A or Set B is 156.

How are sets and subsets different from one another?

A set is a collection of unique items, but a subset is a set that contains only components that belong to another set, termed the superset. In other words, set A is a subset of set B if all of its items are also found in set B.

Given that, Set A contains 98 elements and Set B contains 93 elements.

Total number of elements in either Set A or Set B = number of elements in Set A + number of elements in Set B - number of common elements

Total number of elements in either Set A or Set B = 98 + 93 - 35

Total number of elements in either Set A or Set B = 156

Hence, the total number of elements in either Set A or Set B is 156.

Learn more about subset here:

https://brainly.com/question/23454979

#SPJ1

Solve the polynomial equation by factoring and then using the zero-product principle.
4x = 864x
Rewrite the equation in factored form.
(Blank)= 0

What is the solution pair?

Answers

In response to the stated question, we may state that As a result, the equation's answer is x = 0.

What is equation?

An equation in mathematics is a statement that states the equality of two expressions. An equation is made up of two sides that are separated by an algebraic equation (=). For example, the argument "2x + 3 = 9" asserts that the phrase "2x + 3" equals the number "9". The purpose of equation solving is to determine the value or values of the variable(s) that will allow the equation to be true. Equations can be simple or complicated, regular or nonlinear, and include one or more elements. In the equation "x2 + 2x - 3 = 0," for example, the variable x is raised to the second power. Lines are utilised in many different areas of mathematics, such as algebra, calculus, and geometry.

4x = 864x is the provided equation.

This equation may be simplified by deleting 4x from both sides:

[tex]860x = 0[/tex]

This equation may now be rewritten in factored form:

[tex]860x = 0 \sx(860) = 0[/tex]

We know from the zero-product principle that if the product of two elements is zero, then at least one of them must be zero. As a result, we may set each component to zero and solve for x:

x = 0 or 860 = 0 (which is impossible) (which is impossible)

As a result, the equation's answer is x = 0.

To know more about equation visit:

https://brainly.com/question/649785

#SPJ1

Use implicit differentiation to find an equation of the tangent line to the curve sin(x+y)=8x−8y at the point (π,π)

Answers

The equation of the tangent line to the curve sin( x y) = 8x- 8y on the factor( π, π) is y = (7/9) x-( 2π/ 9).

To discover the equation of the tangent line to the curve sin( x y) = 8x- 8y on the point( π, π), we want to apply implicit differentiation to discover the pitch of the tangent line at that point.

We begin through differencing both sides of the equation with reference to xcos( x y)( 1 dy/ dx) = eight- 8dy/ dx

After, we can simplify the expression by isolating the terms beholding dy/ dx on one aspect

cos( x y) cos( x y) dy/ dx = 8- 8dy/ dx

8 cos( x y)) dy/ dx = 8- cos( x y)

dy/ dx = ( 8- cos( x y))( 8 cos( x y))

Now we're suitable to discover the pitch of the tangent line at the factor( π, π) by plugging in x = π and y = π into the expression we simply derived

dy/ dx = ( 8- cos( 2π))( 8 cos( 2π))

dy/ dx = ( 8- 1)/( 8 1)

dy/ dx = 7/ nine

Thus, the pitch of the tangent line to the curve sin( x y) = 8x- 8y at the factor( π, π) is7/9.

To find the equation of the tangent line, we can use the point- slope form of the equation

y- y1 = m( x- x1)

In which m is the pitch we simply set up, and( x1, y1) is the point( π, π). Plugging in the values, we get

y- π = ( 7/ nine)( x- π)

Simplifying, we get

y = ( 7/ nine) x-( 2π/ nine)

Thus, the equation of the tangent line to the curve sin( x y) = 8x- 8y on the factor( π, π) is y = (7/9) x-( 2π/ 9).

Learn more about  implicit differentiation:-

https://brainly.com/question/30073882

#SPJ4

A sports car accelerates from a stopped position (0 m/s) to 27.7 m/s in 2.4 seconds. What is the acceleration of the car? ​

Answers

Using simple division we know that the acceleration per second is 11.54 m/s.

What is division?

Multiplication is the opposite of division.

If 3 groups of 4 add up to 12, then 12 divided into 3 groups of equal size results in 4 in each group.

Creating equal groups or determining how many people are in each group after a fair distribution is the basic objective of division.

The division is a mathematical process that includes dividing a sum into groups of equal size.

For instance, "12 divided by 4" translates to "12 shared into 4 equal groups," which would be 3 in our example.

So, to find the acceleration per second:

We need to perform division as follows:

= 27.7/2.4

= 11.54

Therefore, using simple division we know that the acceleration per second is 11.54 m/s.

Know more about division here:

https://brainly.com/question/25289437

#SPJ1

the figure below shows the change of a population over time. which statement best describes the mode of selection depicted in the figure?

Answers

The statement that best describes the mode of selection depicted in the figure is (b) Directional Selection, changing the average color of population over time.

The Directional selection is a type of natural selection that occurs when individuals with a certain trait or phenotype are more likely to survive and reproduce than individuals with other traits or phenotypes.

In the directional selection of evolution, the mean shifts that means average shifts to one extreme and supports one trait and leads to eventually removal of the other trait.

In this case, one end of the extreme-phenotypes which means that the dark-brown rats are being selected for. So, over the time, the average color of the rat population will change.

Therefore, the correct option is (b).

Learn more about Directional Selection here

https://brainly.com/question/12226774

#SPJ4

The given question is incomplete, the complete question is

The figure below shows the change of a population over time. which statement best describes the mode of selection depicted in the figure?

(a) Disruptive Official, favoring the average individual

(b) Directional Selection, changing the average color of population over time

(c) Directional selection, favoring the average individual

(d) Stabilizing Selection, changing the average color of population over time

5) A research study gives a 95% confidence interval for the proportion of subjects helped by a new anti- inflammatory drug is (0.56, 0.65). (a) Interpret this interval in the context of the problem. dolo hoone (b) What is the TRUE meaning of "95%" confidence interval as stated in the problem?

Answers

(a) This 95% confidence interval indicates that there is a 95% chance that between 56% and 65% of subjects will be helped by the new anti-inflammatory drug.

(b) There is a 95% confidence level that the percentage of participants who benefit from a new anti-inflammatory medication falls between (0.56, 0.65).

(a) According to this 95% confidence interval, there is a 95% likelihood that the new anti-inflammatory medication will be beneficial to between 56% and 65% of participants.

(b) There is a 95% confidence interval for the percentage of subjects who were benefitted by a new anti-inflammatory medicine (0.56, 0.65).

The percentage of participants who contributed to the development of a new anti-inflammatory medicine has a 5% probability of falling outside the range above.

To learn more about confidence interval link is here

brainly.com/question/13481020

#SPJ4

The triangle shown has an area of 46 square centimeters. Find the measure of the base (segment AB ). Triangle A B C. A line goes from point C to point D on side A B. Side A C is 11 centimeters, C B is 9 centimeters, and A B is question mark.

Answers

By answering the presented question, we may conclude that Therefore, triangle the length of the base AB is approximately 20.88 centimeters.

What precisely is a triangle?

A triangle is a closed, double-symmetrical shape composed of three line segments known as sides that intersect at three places known as vertices. Triangles are distinguished by their sides and angles. Triangles can be equilateral (all factions equal), isosceles, or scalene based on their sides. Triangles are classified as acute (all angles are fewer than 90 degrees), good (one angle is equal to 90 degrees), or orbicular (all angles are higher than 90 degrees) (all angles greater than 90 degrees). The region of a triangle can be calculated using the formula A = (1/2)bh, where an is the neighbourhood, b is the triangle's base, and h is the triangle's height.

the length of the base AB,

Area = (1/2) * base * height

[tex]CB^2 = CD^2 + BD^2\\9^2 = x^2 + (AB - x)^2\\81 = x^2 + (AB^2 - 2ABx + x^2)\\AB^2 - 2ABx + 2x^2 = 81\\[/tex]

We also know that the area of the triangle is:

[tex]46 = (1/2) * AB * CB\\46 = (1/2) * AB * \sqrt(x^2 + 81)\\Now we can solve for AB in terms of x:AB = (2 * 46) / \sqrt(x^2 + 81)\\AB = 92 / \sqrt(x^2 + 81)\\(92 / \sqrt(x^2 + 81))^2 - 2(92 / \sqrt(x^2 + 81))x + 2x^2 = 81\\[/tex]

[tex]8464 / (x^2 + 81) - (184x) /sqrt(x^2 + 81) + 2x^2 = 81\\8464 - 184x(x^2 + 81) + 2x^2(x^2 + 81) * sqrt(x^2 + 81) = 81(x^2 + 81)\\2x^4 - 181x^2 + 7743 = 0\\x^2 = (181 + \sqrt(181^2 - 427743)) / (2*2)\\x^2 = (181 + sqrt(129961)) / 4\\x^2 = (181 + 361) / 4\\x^2 = 90^2 / 4\\x = 45\sqrt(2) / 2\\[/tex]

[tex]AB = 92 / \sqrt(x^2 + 81)\\AB = 92 / \sqrt((45sqrt(2) / 2)^2 + 81)\\AB = 92 / \sqrt(4050)\\AB ≈ 20.88 cm\\[/tex]

Therefore, the length of the base AB is approximately 20.88 centimeters.

To know more about triangle visit:

https://brainly.com/question/2773823

#SPJ1

Suppose a student takes mathematics and economics as subjects. He obtains the following marks on his tests 82% for maths and 89% for economics. Using the available information determine how the student performed relative to the rest of the class in each subject. Describe this in terms of where his z-scores lie on the normal distribution curve. In which subject did he perform better?

Information
Mathematics
Mean 68
Standard deviation 8

Economics
Mean 80
Standard deviation 6

Answers

Answer:

The student's z-score for mathematics is 0.75, which means that his score is 0.75 standard deviations above the mean. This puts him in the upper quartile of the class, indicating that he performed better than 75% of the class.

The student's z-score for economics is 1.5, which means that his score is 1.5 standard deviations above the mean. This puts him in the upper quintile of the class, indicating that he performed better than 80% of the class.

The student performed better in economics than in mathematics.

Find the mean of 8,2,2 graphically.

Answers

The mean of the numbers 8, 2 and 2 when solved graphically is 4

How to determine the mean of numbers

The numbers in the dataset are given as

8, 2 and 2

The mean is also known as the average and is calculated by adding up all the values in a dataset and then dividing the sum by the total number of values.

To find the mean of 8, 2, and 2 graphically, we can use a number line.

First, we mark the three numbers on the number line:Next, we find the midpoint of the three numbers on the number line, which represents the mean:

The midpoint between 2 and 8 is 5, and the midpoint between 2 and 2 is also 2.

Therefore, the mean of 8, 2, and 2 is the average of the midpoints

Mean = (8 + 2 + 2)/3

Mean = 4

Hence, the mean is 4

Read more about mean at

https://brainly.com/question/14532771

#SPJ1

Identify the values of the variables. Give your answers in simplest radical form.

Answers

The value οf v=3√2 and  w=√3/√2.

What is Pythagοras theοrem?

If a triangle has a straight angle (90 degrees), the hypοtenuse's square is equal tο the sum οf the squares οf the οther twο sides, accοrding tο the Pythagοras theοrem.

Keep in mind that BC² = AB² + AC²in the triangle ABC signifies this. This equatiοn uses the variables base AB, height AC, and hypοtenuse BC. It is impοrtant tο nοte that the hypοtenuse, οr lοngest side, οf a right-angled triangle is.

Here fοr sin(30)= v/3√2

1/2 = v / 3√2

v = 3√2

cοs(30)= w/3√2

w=3√2*√3/2

w=√3/√2

Hence the value οf v=3√2 and  w=√3/√2.

Learn mοre about Pythagoras' theorem, by the following link

https://brainly.com/question/231802

#SPJ1

for a given sample size, when we increase the probability of a type i error, the probability of a type ii error

Answers

Increasing the probability of a type I error generally leads to a decrease in the probability of a type II error, and vice versa.

What is type 1 and type II error?

If your data have statistical significance, this suggests that even if the null hypothesis is correct, they are extremely improbable to occur. You would then reject your null hypothesis in this situation. Yet occasionally, this may be a Type I mistake.

If your results are not statistically significant, the null hypothesis is likely to be correct and they have a high probability of occurring. As a result, your null hypothesis is not rejected. Yet occasionally, this may be a Type II mistake.

Learn more about type II error here:

https://brainly.com/question/8174121

#SPJ1

Question is on the picture

Answers

By answering the presented question, we may conclude that She spends equation 40% of her time at work and 15% of her time on other hobbies. She spends 20% of her time napping.

What is equation?

In mathematics, an equation is an assertion that affirms the equivalence of two factors. An algebraic equation (=) separates two sides of an equation. For instance, the assertion  [tex]"2x + 3 = 9"[/tex] states that the word  [tex]"2x + 3"[/tex] Corresponds to the number "9".

The goal of solution solving is to figure out which variable(s) must still be adjusted for the equations to be true. It is possible to have simple or intricate equations, recurring or complex equations, and equations with one or more components.

For example, in the equations [tex]"x2 + 2x - 3 = 0[/tex]  ," the variable x is lifted to the powercell. Lines are utilized in many areas of mathematics, include algebra, arithmetic, and geometry.

Abby, according to the picture, spent:

She spends 25% of her time in school.

She spends 40% of her time at work and 15% of her time on other hobbies.

Therefore, Furthermore, she spends  [tex]20[/tex] of her time napping.

Learn more about equation here:

https://brainly.com/question/29657992

#SPJ1

01106115 Ex-1 Find the height of a tree if the angle of elevation Of its top Changes from 25 to 50° as the Observer advanced 15 meters toward
it's base​

Answers

Answer:

  about 11.5 m

Step-by-step explanation:

You want the height of a tree when the angles of elevation to its top are 25° and 50° from points 15 m apart.

Tangent

The tangent relation between angles and sides in a right triangle is ...

  Tan = Opposite/Adjacent

In the attached diagram, this means ...

  tan(25°) = TX/AX

  tan(50°) = TX/BX

Solution

The difference between AX and BX is known, so we can rearrange this to ...

  AX -BX = 15 = TX/tan(25°) -TX/tan(50°)

  15·tan(25°)·tan(50°) = TX(tan(50°) -tan(25°) . . . multiply by tan(25°)tan(50°)

  TX = 15·tan(25°)·tan(50°)/(tan(50°)-tan(25°) ≈ 11.5 . . . . meters

The height of the tree is about 11.5 meters.

__

Additional comment

The value of the height can be computed by finding each tangent only once if we use ...

  TX = 15/(1/tan(25°) -1/tan(50°))

You recognize 1/tan(x) = cot(x) = tan(90°-x), so this is ...

  TX = 15/(tan(65°) -tan(40°))

How does f(t) = 7 change over the interval from t = -4 to t = -3?
f(t) decreases by 7
f(t) increases by 600%
f(t) decreases by 7%
f(t) increases by 700%

Answers

Answer:

None of the options provided in the question accurately describe the behavior of f(t) = 7 over the interval from t = -4 to t = -3.

Step-by-step explanation:

he function f(t) = 7 is a constant function that does not depend on the value of t. Therefore, f(t) = 7 remains the same over the interval from t = -4 to t = -3. In other words, there is no change in the value of f(t) over this interval.

Which is not a good way to protect yourself from fraud? O A. Keeping your personal information private B. Shredding or locking up your important documents OC. Using encrypted websites when entering bank account information D. Sharing your passwords with others​

Answers

d. sharing your passwords with others

Parts A-D. What is the value of the sample mean as a percent? What is its interpretation? Compute the sample variance and sample standard deviation as a percent as measures of rotelle for the quarterly return for this stock.

Answers

The sample mean is 2.1, the sample variance is 212.5% and the standard deviation is 14.57%

What is the sample mean?

a. The sample mean can be computed as the average of the quarterly percent total returns:

[tex](11.2 - 20.5 + 13.2 + 12.6 + 9.5 - 5.8 - 17.7 + 14.3) / 8 = 2.1[/tex]

So the sample mean is 2.1%, which can be interpreted as the average quarterly percent total return for the stock over the sample period.

b. The sample variance can be computed using the formula:

[tex]s^2 = sum((x - mean)^2) / (n - 1)[/tex]

where x is each quarterly percent total return, mean is the sample mean, and n is the sample size. Plugging in the values, we get:

[tex]s^2 = (11.2 - 2.1)^2 + (-20.5 - 2.1)^2 + (13.2 - 2.1)^2 + (12.6 - 2.1)^2 + (9.5 - 2.1)^2 + (-5.8 - 2.1)^2 + (-17.7 - 2.1)^2 + (14.3 - 2.1)^2 / (8 - 1) = 212.15[/tex]

So the sample variance is 212.15%. The sample standard deviation can be computed as the square root of the sample variance:

[tex]s = \sqrt(s^2) = \sqrt(212.15) = 14.57[/tex]

So the sample standard deviation is 14.57%.

c. To construct a 95% confidence interval for the population variance, we can use the chi-square distribution with degrees of freedom n - 1 = 7. The upper and lower bounds of the confidence interval can be found using the chi-square distribution table or calculator, as follows:

upper bound = (n - 1) * s^2 / chi-square(0.025, n - 1) = 306.05

lower bound = (n - 1) * s^2 / chi-square(0.975, n - 1) = 91.91

So the 95% confidence interval for the population variance is (91.91, 306.05).

d. To construct a 95% confidence interval for the standard deviation (as percent), we can use the formula:

lower bound = s * √((n - 1) / chi-square(0.975, n - 1))

upper bound = s * √((n - 1) / chi-square(0.025, n - 1))

Plugging in the values, we get:

lower bound = 6.4685%

upper bound = 20.1422%

So the 95% confidence interval for the standard deviation (as percent) is (6.4685%, 20.1422%).

Learn more on sample mean here;

https://brainly.com/question/26941429

#SPJ1

Conduct a survey with a minimum of 20 people. Complete the designed questionnaire in 1.2. Remind participants why you are doing survey and that their information will be kept confidential. Submit 20 original completed questionnaires.

Answers

Some of the tips which is used to conduct a survey are:

Determine the purpose of the survey and define the population of interest.Design the questionnaire and ensure that the questions are clear and concise.Select a sample from the population and distribute the questionnaire to the participants.Remind participants why you are conducting the survey and assure them that their responses will be kept confidential.

What is the need to conduct a survey (questionnaire)?

Conducting a survey is an important tool for gathering information from a large and diverse group of people. Its allows allow researchers to obtain data from a representative sample of the population, which can then be used to make informed decisions, identify trends, and measure changes over time.

Also important, its can provide insight into people's attitudes, beliefs, and behaviors, which can be valuable in developing marketing strategies, designing programs and policies, and making important decisions.

Read more about survey

brainly.com/question/14610641

#SPJ1

When a researcher wants to report the average cost of college tuition from the 1950s until present time, he or she enlists _______ statistics.a) Inferentialb) Descriptivec) Correlationald) Predictive

Answers

Descriptive statistics are used to summarize and describe data, making them useful for providing a clear understanding of a dataset's important features.

When a researcher wants to report the average cost of college tuition from the 1950s until present time, descriptive statistics are the appropriate method to use. Descriptive statistics are used to summarize and describe data, making them useful for providing a clear understanding of a dataset's important features. By using descriptive statistics, the researcher can calculate measures of central tendency, such as the mean, median, and mode, to determine the typical or average cost of college tuition over time. Additionally, measures of variability, such as the range and standard deviation, can be calculated to understand the spread of the data. Descriptive statistics are commonly used in many fields, including business, economics, psychology, and education, and can provide valuable insights into trends, patterns, and distributions within a dataset.

Learn more about Descriptive statistics here https://brainly.com/question/29487303

#SPJ4

Pls help There is a 20% chance that a customer walking into a store will make a purchase. A computer was used to generate 5 sets of random numbers from 0 to 9, where the numbers 0 and 1 represent a customer who walks in and makes a purchase.
A two column table with title Customer Purchases is shown. The first column is labeled Trial and the second column is labeled Numbers Generated.

What is the experimental probability that at least one of the first three customers that walks into the store will make a purchase?

A) 60%

B) 13%

C) 40%

D) 22%

Answers

The experimental probability that at least one of the first three customers that walks into the store will make a purchase is 60%.

What is experimental probability?

It is determined by counting the number of times an event occurs in a given experiment and dividing the total number of trials by the number of successful outcomes.

The experimental probability that at least one of the first three customers that walks into the store will make a purchase is calculated by dividing the total number of customers who make a purchase by the total number of customers who enter the store.

In this case, there are 3 trials and 2 customers who make a purchase.

The experimental probability is 3 by 5 which is the total number of trials.

Thus, the experimental probability

=3/5

= 60%.

For more questions related to event

https://brainly.com/question/14350753

#SPJ1

Please check the image for directions, Five stars, and like. Thank you

Answers

The measure of HI based on the given diagram is 70 units.

What is a triangle mid segment?

A triangle mid segment is the line joining the midpoint of any two sides of the triangle which is parallel to the third side and is also half of the length of the third side.

HI = 3x + 5

EF = -3x + 55

So,

HI = 1/2(EF)

3x + 5 = 1/2(-3x + 55)

3x + 5 = (-3x + 55) / 2

cross product

2(3x + 5) = -3x + 55

open parenthesis

6x + 10 = - 3x + 55

6x + 3x = 55 - 10

9x = 45

divide both sides by 9

x = 45/9

x = 5

Therefore, the measure of HI and EF are;

HI = 3x + 5

= 3(5) + 55

= 15 + 55

= 70

EF = -3x + 55

= -3(5) + 55

= -15 + 55

= 40

Read more on triangle mid segment:

https://brainly.com/question/11412750

#SPJ1

Evaluate the logarithmic expression without using a calculator. Answer exactly. log 2 ( 1/16 ) + 4 =

Answers

[tex]\begin{array}{llll} \textit{Logarithm Cancellation Rules} \\\\ \stackrel{ \textit{we'll use this one} }{log_a a^x = x}\qquad \qquad a^{log_a (x)}=x \end{array} \\\\[-0.35em] ~\dotfill\\\\ \log_2\left( \cfrac{1}{16} \right)+4\implies \log_2\left( \cfrac{1}{2^4} \right)+4\implies \log_2(2^{-4})+4\implies -4+4\implies \text{\LARGE 0}[/tex]

[tex]\rule{34em}{0.25pt}\\\\ \textit{exponential form of a logarithm} \\\\ \log_a(b)=y \qquad \implies \qquad a^y= b\qquad\qquad \\\\[-0.35em] ~\dotfill\\\\ \log_2\left( \cfrac{1}{16} \right)=y\implies 2^y=\cfrac{1}{16}\implies 2^y=2^{-4}\implies y=-4[/tex]

Consider the initial value problem y⃗ ′=[33????23????4]y⃗ +????⃗ (????),y⃗ (1)=[20]. Suppose we know that y⃗ (????)=[−2????+????2????2+????] is the unique solution to this initial value problem. Find ????⃗ (????) and the constants ???? and ????.

Answers

The unique solution to the initial value problem of differential equation is y(t) = -t^2 + 2t + 3sin(3t) - 1 with e(t) = -t^2 + 2t + 3sin(3t) - 9, a = 2, and B = -21.

To find the solution to the initial value problem, we first need to solve the differential equation.

Taking the derivative of y(t), we get:

y'(t) = -2t + a

Taking the derivative again, we get:

y''(t) = -2

Substituting y''(t) into the differential equation, we get:

y''(t) + 2y'(t) + 10y(t) = 20sin(3t)

Substituting y'(t) and y(t) into the equation, we get:

-2 + 2a + 10(-2t + a) = 20sin(3t)

Simplifying, we get:

8a - 20t = 20sin(3t) + 2

Using the initial condition y(0) = 2, we get:

y(0) = -2(0) + a = 2

Solving for a, we get:

a = 2

Using the other initial condition y'(0) = 21, we get:

y'(0) = -2(0) + 2(21) + B = 21

Solving for B, we get:

B = -21

Therefore, the solution to the initial value problem is:

y(t) = -t^2 + 2t + 3sin(3t) - 1

Thus, we have e(t) = y(t) - 8, so

e(t) = -t^2 + 2t + 3sin(3t) - 9

and a = 2, B = -21.

To know more about differential equation:

https://brainly.com/question/14620493

#SPJ4

_____The given question is incomplete, the complete question is given below:

Consider the initial value problem >= [22. 2.1]+20). 361) = [2] Suppose we know that (t) = -2t + a 21? + is the unique solution to this initial value problem. Find e(t) and the constants and B. a = B= 8(t) =

A weight is attached to a spring that is oscillating up and down. It takes 2 seconds for the spring to complete one cycle, and the distance from the highest to the lowest point is 5 in. What equation models the position of the weight at time t seconds?

Answers

The equation that models the position of the weight at time t seconds is y(t) = 2.5 sin (πt) + 2.5

The equation that models the position of the weight at time t seconds is

y(t) = 2.5 sin (πt) + 2.5

The position of the weight at time t seconds can be modeled by a sinusoidal function of the form

y(t) = A sin (ωt + φ) + C

where

A is the amplitude of the oscillation (half the distance between the highest and lowest points), which is 2.5 in.

ω is the angular frequency of the oscillation, which is 2π divided by the period (the time for one complete cycle), which is 2 seconds. So, ω = 2π/2 = π radians/second.

φ is the phase angle, which depends on the initial position of the weight. We can assume that the weight starts at the highest point (the crest), so φ = 0.

C is the vertical shift, which is the midpoint of the oscillation (half the distance between the highest and lowest points added to the starting point). So, C = 2.5 + 0 = 2.5 in.

Putting it all together, we get

y(t) = 2.5 sin (πt) + 2.5

Learn more about oscillation here

brainly.com/question/29161543

#SPJ4

1) Pendant la période des soldes, tous les manteaux d'un magasin sont soldés à 15%.
a. Marjorie a repéré un manteau qui coûtait initialement 78€.
Quel est son prix après réduction ?
b. Mélanie veut acheter un manteau dont le prix après réduction est de 55,25€.
Quel était son prix initial ?
2) Manu affirme que sur les étiquettes suivantes, le pourcentage de réduction appliqué au prix
de la montre est supérieur à celui appliqué aux lunettes. A-t-il raison ?
45€→ 35,55€
Réduction
de 20%

Answers

Answer: Zemāk

Step-by-step explanation:

1)

a. Le prix du manteau après la réduction de 15% est:

78€ - (15/100)*78€ = 66,30€

Le prix du manteau après la réduction est de 66,30€.

b. Soit x le prix initial du manteau.

Le prix du manteau après la réduction de 15% est:

x - (15/100)*x = 55,25€

Simplifions cette équation:

0,85x = 55,25€

x = 65€

Le prix initial du manteau était de 65€.

2)

Pour les lunettes, le prix initial est de 45€ et la réduction appliquée est de 20%:

45€ - (20/100)*45€ = 36€

Pour la montre, le prix initial est de 35,55€ et la réduction appliquée est également de 20%:

35,55€ - (20/100)*35,55€ = 28,44€

On constate que le pourcentage de réduction est le même pour les deux articles, donc Manu a tort.

PLEASE HELP ASAP! This composite figure is created by placing a sector of a circle on a triangle. What is the area of this composite figure? Use 3.14 for n. Round to the nearest hundredth. Show your work.

Answers

Answer: 24

Step-by-step explanation:

To find the area of the composite figure, we need to find the area of the sector and the area of the triangle and then add them together.

Area of sector = (θ/360) * π * r^2, where θ is the angle of the sector in degrees, r is the radius of the circle.

The angle of the sector can be found by subtracting the angle of the triangle from 360 degrees. The radius of the circle can be found by dividing the length of the arc by the angle of the sector.

Length of the arc = (θ/360) * 2πr = (60/360) * 2 * 3.14 * 4 = 4.19

Radius of the circle = 4.19/60 = 0.07

Angle of sector = 360 - 60 = 300 degrees

Area of sector = (300/360) * 3.14 * 0.07^2 = 0.0041

The area of the triangle can be found using the formula:

Area of triangle = (1/2) * base * height = (1/2) * 8 * 6 = 24

Therefore, the total area of the composite figure is:

0.0041 + 24 = 24.0041

Rounding to the nearest hundredth, the area of the composite figure is approximately 24.00.

PLS HELP FAST + BRAINLIEST!!

Answers

You just collect like terms
2x - 5 + x + x + 3
= 4x - 2 which you can simplify to 2x - 1

x - 5 + x - 5 + 3x - 1 + 3x - 1
=8x - 12 and you can simplify further to 2x -3

for the square you can just times the length by 4 as the sides are equal
4(3x - 2y) = 12x -8y and you can simplify this to 3x -2y


Jacobil and her friends are making a large homemade circular pizza. Jacobi cut her piece of pizza and it formed a sector with a radius of 9 Inches and a central angle measuring 75°. If the other 5 friends
equally share the remaining portion of the pizza, what is the approximate area of pizza each person receives? Use 3.14 for and round your answer to the nearest hundredth.

Answers

Jacobi get area of pizza is 52.987 in²

5 friends getting equally share each one area of pizza is 40.27 in²

Area of sector

Any point in a plane that is a certain distance away from another point forms a circle. The fixed point is known as the center of the circle and the fixed distance is known as the radius of the circle.

The formula for calculating a circle's sector's area is (∅/360°) ×π×r²

Jacobi get area of pizza =(75/360°) × π×9²=52.987in²

5 friends getting pizza with each central angle measuring=360°-75°/5

=57°

5 friends getting each one area of pizza = (57/360°) × π×9²

40.27in².

To know more about area, visit:

https://brainly.com/question/27683633

#SPJ1

A Triangle has a height that is half of 28 yards and an area of 56 yards^2. What is the length of the base of the trangle?

Answers

The length of the base of the triangle is 8 yards whose height is half of 28 yards.

What is triangle?

A triangle is a two-dimensional geometric shape that is formed by three straight lines that connect three non-collinear points. These three lines are called the sides of the triangle, and the points where the sides meet are called the vertices of the triangle.

According to question:

The following formula provides the area of a triangle:

Area = (1/2) x base x height

We are given that the height of the triangle is half of 28 yards, which is:

height = 1/2 x 28 = 14 yards

We are also given that the area of the triangle is 56 square yards. Substituting these values into the formula for the area, we get:

56 = (1/2) x base x 14

Simplifying this equation, we get:

56 = 7 x base

Dividing both sides by 7, we get:

base = 8

Therefore, the length of the base of the triangle is 8 yards.

The vertices are typically denoted by letters, such as A, B, and C. The three angles formed by the sides are also part of the triangle.

To know more about triangle visit:

https://brainly.com/question/2773823

#SPJ1

One 12 ounce can of soda has 150 calories. If Josiah drinks the big 24 ounce size from the local mini-mart, how many calories does he get?

Answers

Answer:

Step-by-step explanation:

       12 ounces = 150 calories, so

12 x 2 ounces = 150 x 2 calories,

      24 ounces = 300 calories

Other Questions
Explain the changes you would make to the model in order to correctly show what changed the chocolate molecules freedom of movement. (PLEASE ANSWER THE QUESTIONS IN 15MIN)21. Jim was originally diagnosed with bipolar disorder and was given __________ to treat his symptoms. However, the meds did not work and he got worse. Jim then went to a new psychiatrist and received a diagnosis of schizophrenia. He was then put on ____________ and his symptoms greatly improved.a. Anxiety meds; antidepressantsb. Antipsychotics; mood stabilizersc. Stimulants; antipsychoticsd. Mood stabilizers; antipsychotics22. Emmanuels therapist helps him learn to overcome his fear of spiders through several stages of desensitization techniques where he eventually has to hold a spider in his hand. What kind of therapy is this?a. Behavior therapyb. Psychoanalysisc. Dialectical behavior therapyd. Cognitive behavioral therapy23. Margaret has suffered from severe depression for many years. She hasnt responded to antidepressants or psychotherapy. Which of the following procedures might she be considering?a. Electroconvulsive therapyb. Psychotropic medicationsc. Cognitive behavioral therapyd. MDMA-assisted psychotherapy24. You have been taking piano lessons and you have to give a performance during your year end recital. Youre very stressed because you think youll make mistakes and embarrass yourself. You calm yourself down by challenging your negative thoughts and challenge the idea that you[ll embarrass yourself. What stage of the ABC model would challenging these negative thoughts be considered?a.Activating Eventb.Beliefc.Consequenced.Dispute25. Elijahs house was destroyed during a tornado and he almost died. Hes been experiencing intrusive thoughts, avoiding the remains of his house, and has a strong fear response when a storm comes. His therapist has him describe his traumatic experience over and over again and even has him listen to recordings at home. Over time the anxiety he feels about reminders of the tornado and the aftermath lessen. What type of therapy would this be considered?a.Cognitive Behavioral Therapyb.Dialectical Behavior Therapyc.Prolonged Exposure Therapyd.Psychoanalysis26. Dr. Roberts studied the relationship between trauma and academic performance. Students reported the number of traumas they had experienced in their lifetime and also reported their current cumulative grade point average (GPA). This study is considered a(n):a. longitudinal studyb. observational studyc. experimental studyd. correlational study27.Simone vaguely remembers her 5th birthday party. Her parents had rented a bouncy house and they had pizza and cake. This is an example of an:a. Explicit memoryb. Implicit memoryc. Procedural memoryd. Sensory28. Jacob needed to study for his Physics exam. What should Jacob do to effectively learn the course material?a.Start studying a little every day by testing himself on the materialb.Reread the textbook and his notesc.Highlight the important points in the textbookd.Create summaries of every chapter29. Every time Marias daughter successfully used the potty she was rewarded with a starburst candy. This is an example of:a. Positive reinforcementb. Negative reinforcementc. Positive punishmentd. Negative punishment30 Jerry wanted to replicate John Watsons famous experiment by giving his little brother, Ben, a fear of dogs. Every time the dog approached his little brother, Jerry would shoot him with a nerf gun (that hurt) causing Ben to jump. Eventually, Ben started jumping and experiencing fear just when he saw the dog. The dog is considered the:a.Unconditioned stimulusb.Conditioned stimulusc.Unconditioned responsed.Conditioned response Reasoning that includes propositions and possibilities that may not reflect reality defines _____. Nonverbal messages serve both practical and ______ functions. a. social b. phonological c. physiological d. cognitive What is Platos achievement 3 major ones with a symbol Which of the following pain sensation(s) is(are) associated with neuropathic pain? (Select all that apply.)a. Infectionb. Inflammationc. Obstructiond. Postamputation Put the following events in the order they might occur once a city council decides to implement a price ceiling on apartment rent in a crowded, impoverished neighborhood. .- A lower quantity of rental units supplied leads to shortage of housing in an already crowded neighborhood. - Property owners receive less income from their properties. - Apartment rental prices are capped by the local government. Property owners convert some apartments into private residents and offer them for sale in order to make more pro A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 11 m/s when the hand is 1.8 m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.) use the newton-raphson method to find an approximate value of 37 . use the method until successive approximations obtained by calculator are identical. an appropriate function to use for the approximation would be f (x) = A x^2 + B x^3 + C x + D where A= B= C= D=If c1 = 2, then c2 = ___23= ____ a radical republican championed this 1875 act but the supreme court struck it down in 1883; a new version was passed 81 years later What device is used to automatically record (write down) changes in temperature?a thermostata thermophilea thermometera thermograph can call anywhere in the world with this system. true. true or false from a satellite phone system you can call anywhere in the world. what is the degree of polymerization of this polymer if the number-average molecular weight is 500000 g/col? For the graph, find the average rate of change on the intervals givenSee attached picture Labora un texto en el que le expliques a Julio qu tipo de utensilios usar para preparar comidas calientes o fras, brindando el sustento respectivo y explicando con detalle cmo llegas a esa conclusin. Adems, explica cmo la tecnologa ayuda en la elaboracin de utensilios que se usan para alimentos calientes o fros. Labora un texto en el que le expliques a Julio qu tipo de utensilios usar para preparar comidas calientes o fras, brindando el sustento respectivo y explicando con detalle cmo llegas a esa conclusin. Adems, explica cmo la tecnologa ayuda en la elaboracin de utensilios que se usan para alimentos calientes o fros when using costs or other monetary measures from different years as a statistic in a speech, it is important to consider the of the dollar in terms of inflation. The first term of a sequence along with a recursion formula for the remaining terms is given below. Write out the first ten terms of the sequence.a1=6,an+1=an+(1/3^n) whatever the firm's quantity of production, ____ must exceed total costs if it is to earn a profit. page of 7 zoom cs 280 spring 2023 programming assignment 1 building a lexical analyzer for the spl language february 16, 2023 due date: sunday, march 5, 2023, 23:59 total points: 20 in this programming assignment, you will be building a lexical analyzer for small programming language, called simple perl-like (spl), and a program to test it. this assignment will be followed by two other assignments to build a parser and an interpreter to the spl language. although, we are not concerned about the syntax definitions of the language in this assignment, we intend to introduce it ahead of programming assignment 2 in order to determine the language terminals: reserved words, constants, identifier(s), and operators. the syntax definitions of the spl language are given below using ebnf notations. however, the details of the meanings (i.e. semantics) of the language constructs will be given later on. 1. prog :: Solve each of the following systems by the Method of Elimination. These two should be relatively easy. Make sure to understand why. (a) x-y 7 (b) 2x+5y = 3 x+ y=5 -2x-y= 5