5.
MATHEMATICS Year'
A square is folded into half to form a rectangle as shown below. The perimeter of the rectangle is 36 cm.
Calculate the area of the square.

5.MATHEMATICS Year'A Square Is Folded Into Half To Form A Rectangle As Shown Below. The Perimeter Of

Answers

Answer 1

Answer: 144 [tex]cm^{2}[/tex]

Step-by-step explanation:

The rectangle's length is twice as long as it's width as the square is folded in half. Let's say that the width's length is x, we get the equation

x + 2x + x + 2x = 36

6x = 36

x = 6 cm

The length of the rectangle is the length of the square which is 2x = 2 * 6 = 12 cm

So the area of the square is 12 * 12 = 144 [tex]cm^{2}[/tex]


Related Questions

By following the method, we think about communicating by reviewing the possible things (both general and specific) that might be said. Select one: O a. Free-form O b.Inverse. O c. Cyclical O d. Linear. O e. Topical

Answers

In the topical method, we focus on discussing different topics or subjects by considering various aspects and details related to them. This approach allows us to think about and communicate more effectively by addressing both general and specific points that might be relevant to the conversation.

The method of communication that involves reviewing possible things (both general and specific) that might be said. The correct answer is: e. Topical.

The method described in the question is a form of "topical" communication. This approach involves considering different topics or subjects that may need to be discussed and organizing thoughts and information around them. By reviewing possible things that may be said on each topic, one can prepare for a more effective and focused communication.

                             This method can be especially helpful in situations where there are multiple topics to cover or when discussing complex information that requires careful organization and planning.

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How many and of which kind of roots does the equation f(x) = x³ - x² - x + 1 have?
A. 1 real; 2 complex
B. 2 real; 1 complex
C. 3 real
D. 3 complex

Answers

The number and the kind of roots of the equation, f(x) = x³ - x² - x + 1, is: D. 3 complex roots.

How to Find the Kind of Roots of an Equation?

To determine the number and kind of roots of the equation f(x) = x³ - x² - x + 1, we can analyze the discriminant of the equation.

The discriminant, denoted as Δ, is given by:

Δ = b² - 4ac

In this case, the equation is in the form ax³ + bx² + cx + d = 0, where a = 1, b = -1, c = -1, and d = 1.

Calculating the discriminant:

Δ = (-1)² - 4(1)(-1)(-1) = 1 - 4(1)(1) = 1 - 4 = -3

The discriminant is negative (Δ < 0). This means that there are no real roots for the equation f(x) = x³ - x² - x + 1.

Therefore, the answer is:

D. 3 complex roots

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4y = -2 help pls this is missing I will give pts!!

Answers

Answer:y=-4/2x

Step-by-step explanation:

I need help because need to bring my math grade

Mr. Anderson took Mrs. Anderson out
for a nice steak dinner. The food bill
came out to $89.25 before tax and tip.
If tax is 6% and tip is 15%, what is
the total cost?

Answers

Answer:

$108.80

Step-by-step explanation:

89.25x0.06 = $5.36 tax

89.25 + 5.36= 94.61

94.61 x 0.15 = 14.91 tip

94.61 + 14.91 = 108.80 total

A faster way: 89.25*1.06*1.15=108.80

Your tax is going to be $5.36 bringing your total to $94.61. If you tip on pretax total your tip will be $13.39. (Total will be $102.64) If you tip on the taxed total the tip will be $14.19 bringing the total to $103.44

use the laplace transform to solve the given initial-value problem. 2y'' 36y' 163y = 0, y(0) = 2, y'(0) = 0

Answers

Answer : the solution to the initial-value problem is y(t) = 2e^(-3t) + 2e^(-27t), where t >= 0.

Initial-value problem using Laplace transforms, we'll follow these steps:

1. Take the Laplace transform of the differential equation.

2. Apply the initial conditions to obtain the transformed equation.

3. Solve the transformed equation for the Laplace transform of the unknown function.

4. Take the inverse Laplace transform to find the solution in the time domain.

Step 1: Taking the Laplace transform of the differential equation:

We have the differential equation: 2y'' + 36y' + 163y = 0

Taking the Laplace transform of each term using the properties of the Laplace transform, we get:

2[s^2Y(s) - sy(0) - y'(0)] + 36[sY(s) - y(0)] + 163Y(s) = 0

Step 2: Applying the initial conditions:

We are given y(0) = 2 and y'(0) = 0. Substituting these values into the transformed equation, we get:

2[s^2Y(s) - 2s] + 36[sY(s) - 2] + 163Y(s) = 0

Step 3: Solving the transformed equation for Y(s):

Rearranging the equation, we have:

(2s^2 + 36s + 163)Y(s) = 4s + 72

Dividing both sides by (2s^2 + 36s + 163), we obtain:

Y(s) = (4s + 72) / (2s^2 + 36s + 163)

Step 4: Taking the inverse Laplace transform:

To find the solution y(t) in the time domain, we need to compute the inverse Laplace transform of Y(s). However, the denominator of Y(s) is a quadratic expression, so we need to perform partial fraction decomposition.

The quadratic expression 2s^2 + 36s + 163 can be factored as (s + 3)(s + 27). Therefore, we can rewrite Y(s) as follows:

Y(s) = (4s + 72) / [(s + 3)(s + 27)]

Using partial fraction decomposition, we express Y(s) as:

Y(s) = A / (s + 3) + B / (s + 27)

To find A and B, we multiply both sides by the denominator and equate the numerators:

(4s + 72) = A(s + 27) + B(s + 3)

Expanding and collecting like terms:

4s + 72 = (A + B)s + 27A + 3B

By comparing coefficients, we get the following system of equations:

A + B = 4    ---(1)

27A + 3B = 72 ---(2)

Solving the system of equations, we find A = 2 and B = 2.

Now we can rewrite Y(s) as:

Y(s) = 2 / (s + 3) + 2 / (s + 27)

Taking the inverse Laplace transform of Y(s) using the table of Laplace transforms, we obtain the solution in the time domain:

y(t) = 2e^(-3t) + 2e^(-27t)

Therefore, the solution to the initial-value problem is y(t) = 2e^(-3t) + 2e^(-27t), where t >= 0.

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show if m is a positive integer and a is an integer relatively prime to m such that ordma = m - 1, then m is prime.

Answers

Let us assume that m is not prime. This means that there exists a prime factor p of m such that p ≤ √m. Since a is relatively prime to m, it must also be relatively prime to p.

Now, let's consider the order of a modulo p. We know that ordpa divides p-1, since p is prime. However, since a and p are relatively prime, we also know that ordpa cannot be equal to p-1, since this would imply that a is a primitive root modulo p, which is impossible since p is a prime factor of m and therefore does not have any primitive roots modulo p.
So, ordpa must divide p-1, but it cannot be equal to p-1. Therefore, ordpa must be strictly less than m-1 (since m has p as a factor, which means that m-1 has p-1 as a factor). However, we know that ordma = m-1. This means that ordpa cannot be equal to ordma.
This is a contradiction, since we assumed that ordma = m-1 and that ordpa divides m-1. Therefore, our initial assumption that m is not prime must be false. Therefore, m must be prime.
In conclusion, if m is a positive integer and a is an integer relatively prime to m such that ordma = m-1, then m must be prime.

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Use the limit comparison test to determine if the series converges or diverges. 29) ∑n=1[infinity]​9n3/2−10n−34n
​​

Answers

The series converges based on the limit comparison test.

To determine whether the given series converges or diverges, we can apply the limit comparison test. The limit comparison test states that if the limit of the ratio between the given series and a known convergent series is a finite positive value, then the given series converges. If the limit is zero or infinite, the given series diverges.

Let's consider the series ∑(9n^(3/2) - 10n - 34n) from n = 1 to infinity.

To apply the limit comparison test, we need to find a known convergent series to compare it with. A good choice is the p-series ∑(1/n^p), where p > 0.

Now, let's find the limit of the ratio of the two series:

lim(n→∞) [(9n^(3/2) - 10n - 34n) / (1/n^(3/2))]

= lim(n→∞) [(9n^(3/2) - 10n - 34n) * (n^(3/2))]

= lim(n→∞) [9n^3 - 10n^(5/2) - 34n^(5/2)]

To simplify the expression, divide all terms by n^(5/2):

= lim(n→∞) [(9n^3 / n^(5/2)) - (10n^(5/2) / n^(5/2)) - (34n^(5/2) / n^(5/2))]

= lim(n→∞) [9n^(3 - 5/2) - 10 - 34]

= lim(n→∞) [9n^(1/2) - 10 - 34]

= lim(n→∞) [9n^(1/2) - 44]

Since the limit is a finite value (-44), the ratio converges. Therefore, by the limit comparison test, the given series ∑(9n^(3/2) - 10n - 34n) converges.

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Consider the following problem: The data set includes 107 body temperatures of healthy adult humans for which x=98.7°F and s = 0.72° F. Construct a 99% confidence interval estimate of the mean body temperature of all healthy humans. What is the appropriate symbol to use for the answer?___ < δ < ______ < µ < ______ < p < ______ < z < ______ < n < ___

Answers

The appropriate symbols to use for the answer are: µ - z * (s / √n) < δ < µ + z * (s / √n)

To construct a confidence interval estimate for the mean body temperature of all healthy humans, we can use the symbol "µ" to represent the population mean.

A 99% confidence interval estimate for the mean body temperature can be represented as:

µ - z * (s / √n) < µ < µ + z * (s / √n)

In this expression:

"z" represents the critical value from the standard normal distribution corresponding to the desired confidence level (in this case, 99%).

"s" represents the sample standard deviation.

"n" represents the sample size.

Therefore, the appropriate symbols to use for the answer are:

µ - z * (s / √n) < δ < µ + z * (s / √n)

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Simplify the expression Sqrt 39 (sqrt6+7)

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The simplified expression √39(√6 + 7) is equal to √(39 * 6) + 7√(39 .

To simplify the expression √39(√6 + 7), we can follow these steps:

Step 1: Distribute the square-root (√) to both terms inside the parentheses:

  √39 * √6 + √39 * 7

Step 2: Simplify the square roots separately:

  √(39 * 6) + √(39 * 7)

Step 3: Calculate the products under the square roots:

  √234 + √273

Step 4: Simplify the square roots further:

  √(9 * 26) + √(9 * 3 * 3 * 3)

Step 5: Split the square root of a product into the product of the square roots:

  √9 * √26 + √9 * √(3 * 3 * 3)

Step 6: Simplify the square roots of perfect squares:

  3√26 + 3√(3 * 3 * 3)

Step 7: Multiply the numbers outside the square roots:

  3√26 + 9√3

Note that the simplified form is obtained by simplifying the square roots as much as possible and combining like terms.

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It is assumed that the two tests measure the same aptitude, but use different scalesif a student gets an sat score that is the 29th percentile, find the actual sat score

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Therefore, the actual SAT score for the 29th percentile, use the SAT score percentiles chart, locate the 29th percentile, and identify the corresponding SAT score.

The percentile score indicates the percentage of students who scored lower than the student in question. To find the actual SAT score, we need to use a conversion table that correlates percentile scores with actual SAT scores. For example, if the conversion table shows that a percentile score of 29 corresponds to an actual SAT score of 1150, then the student's actual SAT score is 1150.

To find the actual SAT score of a student who receives a percentile score of 29, we need to use a conversion table that correlates percentile scores with actual SAT scores. The percentile score indicates the percentage of students who scored lower than the student in question. For example, if the conversion table shows that a percentile score of 29 corresponds to an actual SAT score of 1150, then the student's actual SAT score is 1150.
To find the actual SAT score corresponding to the 29th percentile, we'll use the SAT score percentiles chart. The chart maps percentiles to specific SAT scores. Percentiles represent the percentage of test-takers who scored at or below a particular score.

Step 1: Locate an official SAT score percentiles chart. You can find this on the College Board website or other reputable sources.
Step 2: Find the 29th percentile on the chart. Look for the row with "29" in the percentile column.
Step 3: Identify the corresponding SAT score in the same row. This score represents the 29th percentile.

Therefore, the actual SAT score for the 29th percentile, use the SAT score percentiles chart, locate the 29th percentile, and identify the corresponding SAT score.

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a couple plan to have three children. there are eight possible arrangements of girls and boys. for example, ggb means the first two children are girls and the third child is a boy. all eight arrangements are (approximately) equally likely. write down all eight arrangements of the sexes of three children. what is the probability of any one of these arrangements? enter your answer to three decimal places.

Answers

The probability of any one of the eight arrangements is 0.125, or 12.5% when rounded to three decimal places.

There are eight possible arrangements of boys and girls when a couple plans to have three children. They are:

BBB (all boys)

BBG (two boys, one girl)

BGB (one boy, two girls)

BGG (one boy, two girls)

GBB (two boys, one girl)

GBG (one boy, two girls)

GGB (two boys, one girl)

GGG (all girls)

The probability of any one of these arrangements can be calculated using the formula for probability:

Probability = (Number of favorable outcomes) / (Total number of possible outcomes)

In this case, since all eight arrangements are equally likely, the probability of any one of them is:

Probability = 1 / 8

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Write a function when a baseball is thrown into the air with an upward velocity of 30 ft/s.

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this function assumes that the baseball is thrown from ground level, and it does not take into account any external factors that may affect the trajectory of the ball (such as air resistance, wind, or spin).

Assuming that air resistance can be ignored, the height (in feet) of a baseball thrown upward with an initial velocity of 30 ft/s at time t (in seconds) can be modeled by the function:

h(t) = 30t - 16t^2

This function represents the position of the baseball above the ground, and it is a quadratic equation with a downward-facing parabolic shape. The initial velocity of 30 ft/s corresponds to the coefficient of the linear term, and the coefficient of the quadratic term (-16) is half the acceleration due to gravity (32 ft/s^2).

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PLEASE HELPPP

Nico used a colon incorrectly in this sentence:

Prepare for a hurricane by having: water, batteries, and food on hand.

Which sentence corrects Nico's colon mistake?

Prepare for a hurricane by having: Water, batteries, and food on hand.

O Prepare for a hurricane by having the following supplies on hand: water, batteries, and food.

Prepare for a hurricane: by having water, batteries, and food on hand

Prepare for a hurricane by having the following supplies on hand: Water, batteries, and food.​

Answers

Answer:

Step-by-step explanation:

The correct sentence that corrects Nico's colon mistake is:

O Prepare for a hurricane by having the following supplies on hand: water, batteries, and food.

In this sentence, the colon is used correctly to introduce a list of supplies that should be prepared for a hurricane. The first letter of "water" is in lowercase because it is not a proper noun.

Answer:

Prepare for a hurricane by having the following supplies on hand: water, batteries, and food.

Step-by-step explanation:

You use the : whenever you're listing things such as supplies.

Panchito discovered a refreshing beverage by mixing a 5% cranberry juice with a 90% orange juice. How much of each should he mix together to make 150 ml of a 22% cranberry-orange juice blend

Answers

Panchito should mix 30 ml of cranberry juice with 120 ml of orange juice to make 150 ml of a 22% cranberry-orange juice blend.

To determine the amounts of cranberry juice and orange juice that Panchito should mix, we can set up a system of equations based on the given information. Let's assume Panchito mixes x ml of cranberry juice and y ml of orange juice.

The total volume of the mixture is 150 ml: x + y = 150.

The percentage of cranberry juice in the mixture is 22%: (0.05x) / 150 = 0.22.

Simplifying the second equation, we get:

0.05x = 0.22 * 150

0.05x = 33

x = 33 / 0.05

x = 660 ml

Substituting this value back into the first equation, we can solve for y:

660 + y = 150

y = 150 - 660

y = -510 ml

Since the solution for y is negative, it is not feasible. This indicates that there is no way to create a 22% cranberry-orange juice blend using a 5% cranberry juice and a 90% orange juice.

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6.5.3 if (x1, . . . , xn) is a sample from a pareto(α) distribution (see exercise 6.2.9), whereα > 0 is unknown, determine the fisher information.

Answers

The Fisher information for a sample of size n from a Pareto(α) distribution is n/(α^2).

The Fisher information for a Pareto(α) distribution is I(α) = nα² / (α - 1)².

To determine the Fisher information for a sample from a Pareto(α) distribution, follow these steps:

1. Recall the Pareto(α) probability density function (PDF): f(x) = αxᵃ⁺¹), where x ≥ 1 and α > 0.
2. Compute the log-likelihood function, L(α) = ln(f(x1,...,xn)) = ∑ ln(α) - (α+1)ln(xi) for i = 1 to n.
3. Differentiate L(α) with respect to α: dL/dα = ∑ (1/α) - ln(xi).
4. Differentiate dL/dα again: d²L/dα² = -∑ (1/α²).
5. The Fisher information is the negative expectation of the second derivative: I(α) = -E(d²L/dα²).
6. Apply the Pareto(α) distribution's expectation: I(α) = nα² / (α - 1)².

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The nth term test can be used to determine divergence for each of the following series except A arctann n=1 B 61 с n(n+3) = (n + 4) D Inn n=1 

Answers

The nth term test, also known as the Test for Divergence, is a useful tool for determining the divergence of a given series. All of the given series - A) arctan(n), B) 61, C) n(n+3)/(n+4), and D) ln(n) - diverge according to the nth term test.

In order to use this test, you should analyze the limit of the sequence's terms as n approaches infinity. If the limit is not zero, then the series diverges.
For each of the series provided, let's apply the nth term test:
A) arctan(n), n=1 to infinity:
The limit as n approaches infinity of arctan(n) is π/2, which is not zero. Therefore, the series diverges.
B) 61:
Since the series consists of a constant term, the limit as n approaches infinity is 61, which is not zero. Therefore, the series diverges.
C) n(n+3)/(n+4), n=1 to infinity:
As n approaches infinity, the limit of n(n+3)/(n+4) is 1, which is not zero. Therefore, the series diverges.
D) ln(n), n=1 to infinity:
The limit as n approaches infinity of ln(n) is infinity, which is not zero. Therefore, the series diverges.
In conclusion, all of the given series - A) arctan(n), B) 61, C) n(n+3)/(n+4), and D) ln(n) - diverge according to the nth term test.

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Consider two independent random variables X and Y. X has a Uniform distribution on the interval (0, 3). The probability density function of Y is given by fY (y) = y^2/9 if 0 < y < 3; 0 otherwise (a) Calculate P(X / Y > 1). (b) Calculate P(X + Y > 2). (c) Calculate P(X * Y > 3)

Answers

Answer :   ∫∫[Y > 3/X] (1/3) * (y^2/9) dx/dy.

(a) To calculate P(X/Y > 1), we need to find the probability that the ratio of X to Y is greater than 1.

The joint probability density function of X and Y, since they are independent, is given by f(X,Y) = fX(x) * fY(y).

Given that X has a Uniform distribution on (0, 3), the probability density function of X, fX(x), is:

fX(x) = 1/(3-0) = 1/3 for 0 < x < 3, and 0 otherwise.

The probability density function of Y, fY(y), is given as:

fY(y) = y^2/9 for 0 < y < 3, and 0 otherwise.

Now, we can calculate P(X/Y > 1) as follows:

P(X/Y > 1) = ∫∫[X/Y > 1] f(X,Y) dxdy

          = ∫∫[X > Y] fX(x) * fY(y) dxdy

          = ∫∫[X > Y] (1/3) * (y^2/9) dxdy

          = ∫[0,3] ∫[0,x] (1/3) * (y^2/9) dydx

          = (1/3) ∫[0,3] [(1/9) * (y^3/3)] evaluated from 0 to x dx

          = (1/3) ∫[0,3] (x^3/27) dx

          = (1/3) * [(1/108) * (x^4)] evaluated from 0 to 3

          = (1/3) * [(1/108) * (3^4 - 0^4)]

          = (1/3) * [(1/108) * 81]

          = 1/4.

Therefore, P(X/Y > 1) = 1/4.

(b) To calculate P(X + Y > 2), we need to find the probability that the sum of X and Y is greater than 2.

We can calculate this as follows:

P(X + Y > 2) = ∫∫[X + Y > 2] f(X,Y) dxdy

            = ∫∫[X > 2 - Y] fX(x) * fY(y) dxdy

            = ∫∫[X > 2 - Y] (1/3) * (y^2/9) dxdy.

To solve this integral, we can break it into two parts based on the range of Y:

For 0 < y < 2:

∫∫[X > 2 - Y] (1/3) * (y^2/9) dxdy = ∫[0,2] ∫[2-y,3] (1/3) * (y^2/9) dxdy.

For 2 < y < 3:

∫∫[X > 2 - Y] (1/3) * (y^2/9) dxdy = ∫[2,3] ∫[0,3] (1/3) * (y^2/9) dxdy.

Calculating these integrals will give us the desired probability.

(c) To calculate P(X * Y > 3), we need to find the probability that the product of X and Y is greater than 3.

Similarly, we can set up the

integral:

P(X * Y > 3) = ∫∫[X * Y > 3] f(X,Y) dxdy

            = ∫∫[Y > 3/X] fX(x) * fY(y) dxdy

            = ∫∫[Y > 3/X] (1/3) * (y^2/9) dxdy.

We can then evaluate this integral over the appropriate ranges to find the desired probability.

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Consider an angle, and a circle centered at the angle's vertex. The circle's radius is 6 cm long and the angle subtends an arc that is 15.6 cm long. a. What is the angle's measure in radians? radians Preview b. A second circle is centered at the angle's vertex, and the circle's radius is 12 cm long. The subtended arc is how long in cm? (Draw a diagram to help you!) cm

Answers

The subtended arc for the second circle is 31.2 cm long.

Given a circle with a radius of 6 cm and a subtended arc of 15.6 cm, we can find the angle's measure in radians using the formula: angle (in radians) = arc length/radius. Plugging in the values, we get angle = 15.6 cm / 6 cm = 2.6 radians.
For the second circle with a radius of 12 cm, we can find the subtended arc length by rearranging the formula: arc length = angle (in radians) * radius. Using the angle of 2.6 radians, we get arc length = 2.6 radians * 12 cm = 31.2 cm. Therefore, the subtended arc for the second circle is 31.2 cm long.

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use a 2-year weighted moving average to calculate forecasts for the years 1992-2002, with the weight of 0.7 to be assigned to the most recent year data. ("sumproduct" function must be used.)

Answers

The weighted moving average formula with weights of 0.3 and 0.7 can be calculated using the AVERAGE and SUMPRODUCT functions in Excel. This formula can be used to calculate forecasted values for a range of years.

To use a 2-year weighted moving average to calculate forecasts for the years 1992-2002 with the weight of 0.7 assigned to the most recent year data, we can use the SUMPRODUCT function.
First, we need to create a table that includes the years 1990-2002 and their corresponding data points. Then, we can use the following formula to calculate the weighted moving average:
=(0.3*AVERAGE(B2:B3))+(0.7*B3)
This formula calculates the weighted moving average for each year by taking 30% of the average of the data for the previous two years (B2:B3) and 70% of the data for the most recent year (B3). We can then drag the formula down to calculate the forecasted values for the remaining years.
The SUMPRODUCT function can be used to simplify this calculation. The formula for the weighted moving average using SUMPRODUCT would be:
=SUMPRODUCT(B3:B4,{0.3,0.7})
This formula multiplies the data for the previous two years (B3:B4) by their respective weights (0.3 and 0.7) and then sums the products to calculate the weighted moving average for the most recent year. We can then drag the formula down to calculate the forecasted values for the remaining years.
In summary, the weighted moving average formula with weights of 0.3 and 0.7 can be calculated using the AVERAGE and SUMPRODUCT functions in Excel. This formula can be used to calculate forecasted values for a range of years.

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A new car is purchased for $16,500. The value of the car depreciates at 5.75% per year. What will the car be worth, to the nearest penny, after 5 years?

Answers

Answer:

Step-by-step explanation:

I think it would be 500

Answer:

The value of the car after 5 years is $12271.05

The present value of the car, PV = $16500

The rate of depreciation, r = 5.75%

r = 5.75/100

r = 0.0575

Step-by-step explanation:

Kelly draws a rectangle. How many square corners does Kelly's rectangle have?


Choose the answer that makes the statement true. Kelly's rectangle has

Choose. Square corners

Answers

Kelly's rectangle has four square corners.

A rectangle is a quadrilateral with four sides and four angles. In a rectangle, opposite sides are equal in length, and all angles are right angles (90 degrees). A square is a special type of rectangle where all sides are equal in length

. Since a square is a type of rectangle, it also has four right angles, making all its corners square corners. Therefore, Kelly's rectangle, which is not specified as a square, may have different side lengths, but it will still have four right angles, resulting in four square corners.

These corners are formed by the intersection of the sides at right angles, creating a shape with sharp, 90-degree angles. So, regardless of the specific dimensions of Kelly's rectangle, it will always have four square corners.

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A parking garage has 230 cars in it when it opens at 8 ( = 0). On the interval 0 ≤ ≤ 10, cars enter the parking garage at the rate ′ () = 58 cos(0.1635 − 0.642) cars per hour and cars leave the parking garage at the rate ′ () = 65 sin(0.281) + 7.1 cars per hour (a) How many cars enter the parking garage over the interval = 0 to = 10 hours? (b) Find ′′(5). Using correct units, explaining the meaning of this value in context of the problem. (c) Find the number of cars in the parking garage at time = 10. Show the work that leads to your answer.

Answers

Therefore, (a) ∫58cos(0.1635t - 0.642)dt from 0 to 10 gives approximately 822.6 cars, (b) ′′(5) = -65cos(0.281) which is approximately -62.4 cars per hour per hour, (c) Approximately 559 cars in the garage at t = 10.


(a) To find the number of cars entering the parking garage over the interval 0 ≤ t ≤ 10, we need to integrate the rate of cars entering the garage with respect to time. ∫58cos(0.1635t - 0.642)dt from 0 to 10 gives approximately 822.6 cars.
(b) To find ′′(5), we need to differentiate the rate of cars leaving the garage with respect to time twice. ′′(t) = -65cos(0.281) and ′′(5) = -65cos(0.281) which is approximately -62.4 cars per hour per hour. This value represents the rate of change of the rate of cars leaving the garage at t = 5.
(c) To find the number of cars in the parking garage at time t = 10, we need to subtract the total number of cars leaving the garage from the total number of cars entering the garage from t = 0 to t = 10. This gives approximately 559 cars in the garage at t = 10.


Therefore, (a) ∫58cos(0.1635t - 0.642)dt from 0 to 10 gives approximately 822.6 cars, (b) ′′(5) = -65cos(0.281) which is approximately -62.4 cars per hour per hour, (c) Approximately 559 cars in the garage at t = 10.

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A rectangle is 20cm long and 8cm wide. Find the diagonal of the rectangle.

Answers

Answer:

21.5 cm

Step-by-step explanation:

a² + b² = c²

20² + 8² = c²

400 + 64 = c²

464 = c²

c = √464

c = 21.5

Answer: 21.5 cm

The base of each triangle measures 2 centimeters and the perimeter of each triangle is 10 centimeters. What is the approximate total area of the plastic triangles on the spinner? 3. 9 square centimeters 6. 7 square centimeters 7. 7 square centimeters 13. 4 square centimeters.

Answers

The answer is option 13. 4 square centimeters.

Let's first find the length of the sides of each triangle. Since the perimeter of each triangle is 10 centimeters, and each triangle has 3 sides of equal length, the length of each side of the triangles is given by;

Side length = Perimeter ÷ Number of sides

= 10 ÷ 3= 3.33 (rounded to 2 decimal places)

The base of each triangle measures 2 centimeters, and the length of the side is 3.33 centimeters.

We can use the Pythagorean theorem to find the height of the triangles. Using Pythagorean theorem,

a² + b² = c²where a = 1, b = h and c = 3.33

From the formula above, we can find that:

h² = c² - a²

= 3.33² - 1²

≈ 10.77h

≈ √10.77

≈ 3.28

The area of each triangle is given by the formula;

Area = 1/2 x base x height

= 1/2 x 2 x 3.28

= 3.28 square centimeters (rounded to 2 decimal places)

Since there are 4 triangles, the total area of the plastic triangles on the spinner is approximately:

Total area = 4 x 3.28

= 13.12 square centimeters (rounded to 2 decimal places)

Therefore, the answer is option 13. 4 square centimeters.

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give an indexed family of sets that is pairwise disjoint but the intersection over it is nonempty

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The intersection over the indexed family {A_i} is nonempty, as there are no elements that belong to all three sets:
⋂(A_i) = A_1 ∩ A_2 ∩ A_3 = ∅ (empty set)

An indexed family of sets that is pairwise disjoint but has a nonempty intersection can be represented as follows:

Consider an indexed family of sets {A_i} where i belongs to the index set I, with I = {1, 2, 3}. Define the sets A_i as:

A_1 = {1, 2}
A_2 = {2, 3}
A_3 = {1, 3}

The sets are pairwise disjoint since no two sets share any common elements:
A_1 ∩ A_2 = {2} (not empty)
A_1 ∩ A_3 = {1} (not empty)
A_2 ∩ A_3 = {3} (not empty)

However, the intersection over the indexed family {A_i} is nonempty, as there are no elements that belong to all three sets:

⋂(A_i) = A_1 ∩ A_2 ∩ A_3 = ∅ (empty set)

In this example, the indexed family of sets is pairwise disjoint, but the intersection over the family is nonempty.

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A six-pole motor has a coil span of ______. A) 60 B) 90 C) 120 D) 180.

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The correct option: A) 60 . Thus, the coil span of a six-pole motor is 60 degrees, which means that the coil sides connected to the same commutator segment are 60 electrical degrees apart.

The coil span of a motor is the distance between the two coil sides that are connected to the same commutator segment.

The coil span of a six-pole motor can be calculated by dividing the electrical angle of the motor by the number of poles. Since a full electrical cycle is equal to 360 degrees, the electrical angle of a six-pole motor is 360/6 = 60 degrees. Therefore, the coil span of a six-pole motor is 60 degrees.The answer to the question is A) 60. This means that the coil sides connected to the same commutator segment are 60 electrical degrees apart. It is important to note that the coil span affects the motor's performance, as it determines the back electromotive force (EMF) and the torque produced by the motor. A smaller coil span results in a higher back EMF and lower torque, while a larger coil span results in a lower back EMF and higher torque.In conclusion, the coil span of a six-pole motor is 60 degrees, which means that the coil sides connected to the same commutator segment are 60 electrical degrees apart. Understanding the coil span is crucial for designing and analyzing motor performance.

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find the area enclosed by the polar curve r=12sinθ. write the exact answer. do not round.

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To find the area enclosed by the polar curve r = 12sinθ, we can use the formula for the area of a polar curve: A = 1/2 * ∫(r^2)dθ. For r = 12sinθ, the integral limits are from 0 to π because the curve covers a full period of the sine function.

Let's evaluate the integral using angle identity:

A = 1/2 * ∫(r^2)dθ
A = 1/2 * ∫((12sinθ)^2)dθ, with θ from 0 to π

A = 1/2 * ∫(144sin^2θ)dθ

Now, we can use the double angle identity sin^2θ = (1 - cos(2θ))/2:

A = 1/2 * ∫(144(1 - cos(2θ))/2)dθ

A = 72 * ∫(1 - cos(2θ))dθ, with θ from 0 to π

Now, we can integrate:

A = 72 * [θ - 1/2 * sin(2θ)] from 0 to π

A = 72 * [π - 0 - (1/2 * sin(2π) - 1/2 * sin(0))]

A = 72 * π

The exact area enclosed by the polar curve r = 12sinθ is 72π square units.

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using only the digits 0 and 1 how many different numbers consisting of 8 digits can be formed

Answers

The first digit must be 1. The remaining seven ones must be either 0 or 1.

Therefore, there can be formed [tex]2^7=128[/tex] different numbers.

the proportion of variation explained by the model is called the ____group of answer choices a. slope of the line b. sum of squares error c. coefficient of determination d. coefficient of correlation

Answers

The proportion of variation explained by the model is called the coefficient of determination, also denoted as R-squared.

It is a statistical measure that represents the percentage of the variance in the dependent variable that is explained by the independent variable(s) in the regression model. In other words, it measures the goodness of fit of the regression line to the observed data points. The coefficient of determination ranges from 0 to 1, where 0 indicates that the model does not explain any of the variance in the dependent variable, and 1 indicates that the model explains all of the variance in the dependent variable. The coefficient of determination is often used in regression analysis to evaluate the predictive power of the model and to compare the fit of different models.

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The cost of one pound of bananas is greater than $0. 41 and less than $0. 50. Sarah pays $3. 40 for x pounds of bananas. Which inequality represents the range of possible pounds purchased? 0. 41 < 0. 41 less than StartFraction 3. 40 over x EndFraction less than 0. 50. < 0. 50 0. 41 < 0. 41 less than StartFraction x over 3. 40 EndFraction less than 0. 50. < 0. 50 0. 41 < 3. 40x < 0. 50 0. 41 < 3. 40 x < 0. 50.

Answers

A) is correct answer. The inequality that represents the range of possible pounds purchased is 0.41 < (3.40/x) < 0.50.

The inequality that represents the range of possible pounds purchased is as follows:

0.41 < (3.40/x) < 0.50.

Let's discuss the given problem step-by-step.

Sarah pays $3.40 for x pounds of bananas.

The cost of one pound of bananas is greater than $0.41 and less than $0.50.

Therefore, the cost of x pounds of bananas can be written as:

3.40 < x(0.50) and 3.40 > x(0.41)

⇒ 0.41x < 3.40 < 0.50x

⇒ 0.41 < (3.40/x) < 0.50

Hence, the inequality that represents the range of possible pounds purchased is 0.41 < (3.40/x) < 0.50.

The answer is option A.

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