The value of x in the equation 1.5 (x + 4) - 3 = 4.5 (x - 2) is 4.
The BODMAS rule is a rule used to simplify a mathematical equation. BODMAS itself is an abbreviation of the Bracket, Order, Division, Multiplication, Addition, and Subtraction. This rule indicates the sequence in which a mathematical equation should be solved.
As we want to find the value of x, firstly we have to simplify the equation by applying the BODMAS rule to the given equation:
1.5 (x + 4) - 3 = 4.5 (x - 2)
Since there's no Bracket, Order dan Division part that can be solved, so the first step is applying the Multiply part:
1.5x + 6 - 3 = 4.5x - 9
Then we apply the addition and subtraction part:
1.5x - 4.5x = - 9 - 6 + 3
- 3x = - 12
x = 4
Thus, the value of x in the equation 1.5 (x + 4) - 3 = 4.5 (x - 2) is 4.
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Blaise has just launched the website for their company that sells nutritional products online. Suppose X = the number of different pages that a customer hits during a visit to the website.
a. Assuming that there are n different pages in total on her website, what are the possible values that this random variable may take on?
b. Is the random variable discrete or continuous?
2. Let Y = the total time (in minutes) that a customer spends during a visit to the website.
a. What are the possible values of this random variable?
b. Is the random variable discrete or continuous?
a. The possible values of the random variable X are integers from 1 to n, where n is the total number of different pages on the website.
b. The random variable X is discrete.
b. The possible values of the random variable Y are all non-negative real numbers, that is, Y ≥ 0.
b. The random variable Y is continuous.
a. a. Since a customer can only hit one page at a time, the number of pages they hit in a single visit can only be an integer from 1 to n, where n is the total number of pages on the website.
Therefore, the possible values of the random variable X are X = {1, 2, 3, ..., n}.b. A random variable is discrete if it can only take on a countable number of values, which is true for X. Therefore, the random variable X is discrete.
b. The total time a customer spends on the website can be any non-negative real number. Therefore, the possible values of the random variable Y are Y ≥ 0. Since Y can take on any value within a range, it is a continuous random variable.
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Like bias and confounding, effect modification is a natural phenomenon of scientific interest that the investigator needs to eliminate.a. Trueb. False
The given statement is False.
Effect modification, also known as interaction, is not a phenomenon that needs to be eliminated. Instead, it is a phenomenon that the investigator needs to identify and account for in data analysis.
Effect modification occurs when the relationship between an exposure and an outcome differs depending on the level of another variable, known as the effect modifier. Failing to account for effect modification can lead to biased estimates and incorrect conclusions.
Therefore, it is essential for investigators to assess for effect modification and report findings accordingly. This can involve stratifying the data by the effect modifier and analyzing each stratum separately or including an interaction term in the statistical model.
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How can you find the length of RT using similarity? Explain your reasoning
To find the length of RT using similarity, set up a proportion using the corresponding sides of similar triangles ABC and RST, and solve for RT using the given lengths of AB, AC, and RS.
To find the length of RT using similarity, we can make use of the concept of similar triangles. Similar triangles have corresponding angles that are equal, and their corresponding sides are proportional.
Here's the reasoning to find the length of RT:
Identify similar triangles: Look for two triangles within the given information that have corresponding angles that are equal. Let's say we have triangle ABC and triangle RST.
Determine the corresponding sides: Find the sides of triangle ABC that correspond to side RT in triangle RST. Let's say side AB corresponds to RT.
Set up a proportion: Since the triangles are similar, we can set up a proportion using the corresponding sides. The proportion will involve the lengths of the corresponding sides.
For example, if AB corresponds to RT, we can write the proportion as:
AB / RT = AC / RS
Here, AB and AC are the corresponding sides of triangle ABC, and RT and RS are the corresponding sides of triangle RST.
Solve the proportion: Substitute the known values into the proportion and solve for the unknown value, which is RT in this case.
If the lengths of AB and AC are known, and RS is known, we can rearrange the proportion to solve for RT:
RT = (AB * RS) / AC
By applying the concept of similarity and setting up a proportion using the corresponding sides of similar triangles, we can find the length of RT.
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True or False1. The support allows us to look at categorical data as a quantitative value.2. In order for a distribution to be valid, the product of all of the probabilities from the support must equal 1.3. When performing an experiment, the outcome will always equal the expected value.4. The standard deviation is equal to the positive square root of the variance.
1 False
2 True
3 False
4 True
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evaluate the integral. π ∫ 0 f(x) dx 0 where f(x) = sin(x) if 0 ≤ x <π/ 2 cos(x) if π/2 ≤ x ≤π
The value of the integral given in the question ∫(0 to π) f(x) dx is 0.
A key theorem in calculus, the fundamental theorem establishes the connection between integration and differentiation. It claims that evaluating the function's antiderivative at the interval's endpoints will yield the integral of a function over that interval. In other words, the definite integral of f(x) over the interval [a,b] is equal to the difference between F(b) and F(a) if f(x) is a continuous function over the interval [a,b] and F(x) is an antiderivative of f(x). The theory has significant applications in physics, engineering, and economics, among other disciplines.
Given the piecewise function f(x) and the bounds, the integral can be expressed as:
[tex]\int\limitsf(x) dx = \int\limits^a_b {x} \,sin(x) dx + \int\limits\cos(x) dx[/tex]
Now, let's evaluate each integral separately:
1. [tex]\int\limits^{} \, dx (\pi /2 to \pi ) sin(x) dx[/tex]
To evaluate this integral, find the antiderivative of sin(x), which is -cos(x). Now apply the Fundamental Theorem of Calculus:
[tex]-(-cos(\pi /2)) - -(-cos(0)) = cos(0) - cos(\pi /2)[/tex] = 1 - 0 = 1
2. [tex]\int\limits^{} \, dx (\pi /2 to \pi ) cos(x) dx[/tex]:
To evaluate this integral, find the antiderivative of cos(x), which is sin(x). Now apply the Fundamental Theorem of Calculus:
[tex]sin(\pi ) - sin(\pi /2)[/tex]= 0 - 1 = -1
Now, add the results of both integrals:
1 + (-1) = 0
So, the integral [tex]\int\limits^ {} \,f(x) dx[/tex] = 0.
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Replace the polar equation with an equivalent Cartesian equation. r = 26 sin e 1A) y = 26 B) x2 + (y - 13)2 = 169 OC) (x - 13)2 + y2 = 169 D) x2 + (y - 26)2 = 169
The correct answer for the polar equation with an equivalent Cartesian equation is x2 + (y - 26)2 = 169.(option D)
To replace the polar equation r = 26 sin θ with an equivalent Cartesian equation, we can use the conversion formulas x = r cos θ and y = r sin θ. Substituting these into the given equation, we get:
x = 26 cos θ sin θ
y = 26 sin2 θ
Squaring and adding these equations, we can eliminate the trigonometric functions and obtain an equation in terms of x and y:
x2 + y2 = (26 cos θ sin θ)2 + (26 sin2 θ)2
x2 + y2 = 676 sin2 θ
x2 + y2 = 676 (y/26)2
Simplifying this equation, we get:
x2 + (y - 0)2/26 = 169
Therefore, the correct answer is D) x2 + (y - 26)2 = 169. This equation represents a circle centered at (0, 26) with a radius of 13, which is the distance from the origin to the point (0, 26) obtained by setting θ = π/2 in the polar equation. This is the equivalent Cartesian equation for the given polar equation, obtained by replacing the polar coordinates with their Cartesian equivalents.
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Can someone help me find the degree in each lettered angle
The values of the missing angles are:
a) x = 172 and y = 178.
b) p = 36, n = 112 and q = 144.
c) r = 90 and s = 100
We have,
a)
The sum of the angles in a triangle = 180
So,
70 + 38 + x = 180
x = 180 - 108
x = 172
And,
y is the exterior angle.
So,
y = 70 + 108
y = 178
b)
68 is an exterior angle.
So,
68 = 32 + p
p = 68 - 32
p = 36
And,
32 + p + n = 180
32 + 36 + n = 180
n = 180 - 68
n = 112
And,
q = 32 + n
q = 32 + 112
q = 144
c)
In a parallelogram,
The opposite sides are parallel and congruent, and the opposite angles are also congruent.
So,
r = 90
s = 100
Thus,
a) x = 172 and y = 178.
b) p = 36, n = 112 and q = 144.
c) r = 90 and s = 100
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Evaluate the indefinite integral. (Use C for the constant of integration.)
eu
∫(7 − eu)2du
integral.gif
The indefinite integral of (7 - eu)^2 du is 49u - 14(e^u)/1 + e^2u/2 + C.
The indefinite integral of (7 - eu)^2 du is:
∫(7 - eu)^2 du = ∫(49 - 14eu + e^2u) du = 49u - 14(e^u)/1 + e^2u/2 + C
To evaluate the indefinite integral of (7 - eu)^2 du, we use the formula for integrating powers of exponential functions, which states that ∫e^au du = (1/a)e^au + C, where C is the constant of integration. By applying this formula, we can expand the given expression and integrate term by term.
First, we expand (7 - eu)^2 using the binomial theorem, which gives us 49 - 14eu + e^2u. Then, we integrate each term using the formula above, which gives us 49u - 14(e^u)/1 + e^2u/2 + C, where C is the constant of integration.
Therefore, the indefinite integral of (7 - eu)^2 du is 49u - 14(e^u)/1 + e^2u/2 + C.
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how many different strings can be created by rearranging the letters in ""addressee""? simplify your answer to an integer.
there are 56,280 different strings that can be created by rearranging the letters in "addressee".
The word "addressee" has 8 letters, but it contains 3 duplicate letters "e", 2 duplicate letters "d", and 2 duplicate letters "s". Therefore, the number of different strings that can be created by rearranging the letters in "addressee" is:
8! / (3! 2! 2!) = 56,280
what is combination?
In mathematics, combination refers to the selection of a subset of objects from a larger set, where the order in which the objects are selected does not matter.
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Lexi said, “They just charged me $17 dollars in taxes and when I bough bought these outfits for $200.” How much will Ann pay in taxes?
Answer:
8.5% tax rate
Step-by-step explanation:
17/200= 0.085 = 8.5%
There are 12 boys and 14 girls in mr.gupta's math class. find a number of ways mr gupta can select a team of 3 students from the class to work on a group project . the team consists of 1 girl and 2 boys?
a.924
b.80
c.4368
d.20
The answer is (a) 924.
To form a team of 3 students with 1 girl and 2 boys, we need to select 1 girl from the 14 girls and 2 boys from the 12 boys.
The number of ways to select 1 girl from 14 is C(14,1) = 14, and the number of ways to select 2 boys from 12 is C(12,2) = 66.
By the multiplication principle, the total number of ways to form the team is the product of these two numbers:
14 * 66 = 924
Therefore, the answer is (a) 924.
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State the Differentiation Part of the Fundamental Theorem of Calculus. Then find a d/dx integral^x_2 cos(t^4) dt. b Find d/dx integral^6_x cos (squareroot s^4 + 1)ds. C Find d/dx integral^2x + 1_2 In(t + 1)dt. d Find d/dx integral^x_-x z + 1/z + 2 dz. e Find d/dx integral^2_-3x 2^t2 dt.
Thus, Differentiation Part of the Fundamental Theorem of Calculus:
a) sin(t^4)/4
b) sin(sqrt(s^4 + 1))/sqrt(s^4 + 1)
c) (t + 1)ln(t + 1) - (t + 1)
d) (1/2)ln|z + 2| + z
e) (1/ln2)(sqrt(pi)/2)erfi(sqrt(ln2)t)
The Differentiation Part of the Fundamental Theorem of Calculus states that if f(x) is a continuous function on the interval [a,b] and F(x) is an antiderivative of f(x), then:
d/dx integral^b_a f(t) dt = f(x)
Using this theorem, we can find the derivatives of the given integrals as follows:
a) d/dx integral^x_2 cos(t^4) dt
= cos(x^4) [by applying the Differentiation Part of the FTC and noting that the antiderivative of cos(t^4) is sin(t^4)/4]
b) d/dx integral^6_x cos (squareroot s^4 + 1)ds
= -cos(sqrt(x^4 + 1)) [by applying the Differentiation Part of the FTC and noting that the antiderivative of cos(sqrt(s^4 + 1)) is sin(sqrt(s^4 + 1))/sqrt(s^4 + 1)]
c) d/dx integral^2x + 1_2 In(t + 1)dt
= In(x + 1) [by applying the Differentiation Part of the FTC and noting that the antiderivative of ln(t + 1) is (t + 1)ln(t + 1) - (t + 1)]
d) d/dx integral^x_-x z + 1/z + 2 dz
= 0 [by applying the Differentiation Part of the FTC and noting that the antiderivative of z + 1/(z + 2) is (1/2)ln|z + 2| + z]
e) d/dx integral^2_-3x 2^t2 dt
= -6x2^(9x^2) [by applying the Differentiation Part of the FTC and noting that the antiderivative of 2^(t^2) is (1/ln2)(sqrt(pi)/2)erfi(sqrt(ln2)t)]
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A certain sports car comes equipped with either an automatic or a manual transmission, and the car is available in one of four colors. Relevant probabilities for various combinations of transmission type and color are given in the table below.COLORTRANSM?SS?ON TYPE white blue black redA 13 10 11 11M 15 07 15 18Let A = {automatic transmission}, B = { black } , and C = { white }. a) Calculate P(A), P(B), and P(A ? B). b) Calculate both P(A | B) and P(B | A), and explain in context what each of these probabilities represent. c) Calculate and interpret P(A | C) and P(A | C').
P(B) = P(black and A) + P(black and M) = (11+15+15)/80 = 41/80
P(A ? B) = P(black and A) = 41/80
we have P(A) = 1, P(B) = 41/80, and P(A ? B) = 41/80.
P(B | A) = P(A and B) / P(A) = (11+15+15) / (13+10+11+11+15+7+15+18) = 41/80. This represents the probability of a randomly selected black car having an automatic transmission.
P(A | C') = P(A and C') / P(C') = (10+11+15+18) / (10+11+15+18+7+11+11+15) = 54/73. This represents the probability of a randomly selected non-white car having an automatic transmission.
a) From the table, we can calculate the following probabilities:
P(A) = P(A and white) + P(A and blue) + P(A and black) + P(A and red) = (13+10+11+11+15+7+15+18)/80 = 80/80 = 1
P(B) = P(black and A) + P(black and M) = (11+15+15)/80 = 41/80
P(A ? B) = P(black and A) = 41/80
So, we have P(A) = 1, P(B) = 41/80, and P(A ? B) = 41/80.
b) We can calculate the following conditional probabilities:
P(A | B) = P(A and B) / P(B) = (11+15+15) / (11+10+11+15+7+15+18) = 41/77. This represents the probability of a randomly selected car having an automatic transmission, given that it is black.
P(B | A) = P(A and B) / P(A) = (11+15+15) / (13+10+11+11+15+7+15+18) = 41/80. This represents the probability of a randomly selected black car having an automatic transmission.
c) We can calculate the following conditional probabilities:
P(A | C) = P(A and C) / P(C) = (13+15) / (13+10+11+15) = 28/49. This represents the probability of a randomly selected white car having an automatic transmission.
P(A | C') = P(A and C') / P(C') = (10+11+15+18) / (10+11+15+18+7+11+11+15) = 54/73. This represents the probability of a randomly selected non-white car having an automatic transmission.
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The probability values are
(a) P(A) = 9/20, P(B) = 13/50, P(A and B) = 11/100(b) P(A | B) = 11/26, P(B | A) = 11/45(c) P(A | C) = 13/28, P(A | C') = 4/9How to calculate the probabilitiesGiven that
COLOR
TRANSMISSION TYPE white blue black red
A 13 10 11 11
M 15 07 15 18
Also, we have
A = Automatic transmissionB = BlackC = WhiteFor the probabilities, we have
(a) P(A) = (13 + 10 + 11 + 11)/(13 + 10 + 11 + 11 + 15 + 07 + 15 + 18)
P(A) = 9/20
P(B) = (11 + 15)/100
P(B) = 13/50
P(A and B) = 11/100
(b) P(A | B) = P(A and B)/P(B)
P(A | B) = (11/100)/(13/50)
P(A | B) = 11/26
This means that the probability that a car is automatic given that it is black is 11/26
P(B | A) = P(A and B)/P(A)
P(B | A) = (11/100)/(9/20)
P(B | A) = 11/45
This means that the probability that a car is black given that it is automatic is 11/45
(c) P(A | C) = P(A and C)/P(C)
Where P(A and C) = 13/100 and P(C) = 28/100
So, we have
P(A | C) = (13/100)/(28/100)
P(A | C) = 13/28
This means that the probability that a car is automatic given that it is white is 13/28
P(A | C') = P(A and C')/P(C')
Where P(A and C') = 32/100 and P(C') = 72/100
So, we have
P(A | C') = (32/100)/(72/100)
P(A | C') = 4/9
This means that the probability that a car is automatic given that it is not white is 4/9
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Microwaves of wavelength 3. 00 cm are incident normally on a
row of parallel metal rods. The separation of the rods is 8. 00 cm.
The first order diffraction maximum is observed at an angle of 22. 0°
to the direction of the incident waves.
What is the angle between the first and second order diffraction
maxima?
The angle between the first and second order diffraction maxima for microwaves of wavelength 3.00 cm that are incident normally on a row of parallel metal rods with a separation of 8.00 cm and the first order diffraction maximum observed at an angle of 22.0° to the direction of the incident waves is 37.0°.
Explanation:The grating equation is given as;dsinθ = nλWhere;d = separation between the slitsθ = angle between the incident direction and the direction of the diffracted light
λ = wavelength of lightn = order of diffraction
When the first order diffraction maximum is observed at an angle of 22.0°, we have;d sin 22.0° = λ …(1)
Also, when the second order diffraction maximum is observed at an angle θ2, we have;d sin θ2 = 2λ …(2)
Dividing equation (2) by equation (1);
d sin θ2/d sin 22.0°
= 2λ/λsin θ2/sin 22.0°
= 2sin θ2/sin 22.0°
= 2 × 3.00 c/sin 22.0°θ2 = sin⁻¹(2sin 22.0°)θ2 = 37.0°
Therefore, the angle between the first and second order diffraction maxima is 37.0°.
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FILL IN THE BLANK. According to some reports, the proportion of American adults who drink coffee daily is 0.54. Given that parameter, if samples of 500 are randomly drawn from the population of American adults, the mean and standard deviation of the sample proportion are _____, respectively. 0.54 and 0.498 270 and 124.2 0.54 and 11.145 0.54 and 0.0223
According to some reports, the proportion of American adults who drink coffee daily is 0.54. Given that parameter, if samples of 500 are randomly drawn from the population of American adults, the mean and standard deviation of the sample proportion are 0.54 and 0.0223, respectively.
The standard deviation of a population or sample and the standard error of a statistic are quite different, related. The sample mean's standard is the standard deviation . The standard deviation of the set of means that would be found by an infinite number of repeated samples, from the population and computing a mean.
The mean's standard out to the equal the population, the standard deviation is divided by the square root of the sample size, by using the sample standard deviation divided by the square root of the sample size. For a poll's standard is the expected standard deviation of the estimated mean if the same poll were to be conducted multiple times. Thus, the standard error estimates the standard deviation of an estimate, which itself measures how much the estimate depends on the particular sample that was taken from the population.
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10. how many ways are there to permute the letters in each of the following words? evaluate and find the final answer to each question.
The number of ways to permute the letters in "evaluate" is 8!/(3! * 2! * 1! * 1! * 1! * 1!) = 10,080.
In order to calculate the number of ways to permute the letters in a word, we can use the formula n!/(n1! * n2! * ... * nk!), where n is the total number of letters and n1, n2, ... nk are the frequencies of each distinct letter. Applying this formula to the word "evaluate", we have 8 total letters with the following frequencies: e=3, v=1, a=2, l=1, u=1, t=1. Therefore, the number of ways to permute the letters in "evaluate" is 8!/(3! * 2! * 1! * 1! * 1! * 1!) = 10,080.
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Select the orthorhombic unit cell illustratinga (1 2 1] direction. Note: all angles are 90
The orthorhombic unit cell illustrating the (1 2 1) direction will have a straight line connecting the starting corner with the point reached after moving 1 unit along the x-axis, 2 units along the y-axis, and 1 unit along the z-axis
1. Orthorhombic unit cell have lattice parameters a, b, and c and have all angles equal to 90 degrees (α = β = γ = 90°).
2. The (1 2 1) direction refers to the vector direction that moves 1 unit in the x direction (a), 2 units in the y direction (b), and 1 unit in the z direction (c).
3. In an orthorhombic unit cell, you can visualize the (1 2 1) direction by starting at a corner of the unit cell and moving 1 unit along the x-axis, 2 units along the y-axis, and 1 unit along the z-axis.
4. Since all angles in the orthorhombic unit cell are 90 degrees, the (1 2 1) direction will be a straight line connecting the starting point and the final point after moving along the x, y, and z directions.
So, the orthorhombic unit cell illustrating the (1 2 1) direction will have a straight line connecting the starting corner with the point reached after moving 1 unit along the x-axis, 2 units along the y-axis, and 1 unit along the z-axis.
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What is the volume of the composite solid? Use 3.14 for π and round your answer to the nearest cm3. A. 283 cm3 B. 179 cm3 C. 113 cm3 D. 188 cm3
The volume of the composite solid is Vcomposite solid ≈ 282.6 cm³. The answer is A 283 cm3.
To find the volume of the composite solid, the volumes of both the cylinder and the hemisphere must be added together.
This means we will have to use the formula for the volume of a cylinder and that of a hemisphere.
Then add them up.
The formula for the volume of a cylinder is:
Vcylinder = πr²h,
where:
π = 3.14,
r = radius of the base,
h = height
The formula for the volume of a hemisphere is:
Vhemisphere = 2/3 πr³,
where:
π = 3.14
r = radius of the hemisphere
The cylinder has a radius of 3 cm and a height of 10 cm.
Therefore:
Vcylinder = πr²h
= 3.14 × 3² × 10
= 282.6 cm³
Therefore, the volume of the composite solid is:
Vcomposite solid ≈ 282.6 cm³
The answer is A 283 cm3.
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Suppose you budgeted $1800 for fuel expenses for the year. How many miles could you
Given a budget of $1800 for fuel and an assumed cost of 30 cents per mile, an individual would be able to travel a maximum of 6000 miles over the course of an entire year.
To get the maximum number of miles that can be driven with a fuel budget of $1800, we divide the budget by the cost per mile. This gives us the maximum number of miles that can be driven. For the sake of argument, let's say that the hypothetical cost per mile is thirty cents.
The maximum number of miles that can be driven, hence the calculation becomes miles = 1800 / 0.30. We are able to find the solution to the equation by performing the evaluation.
When we divide $1800 by 0.30, we get 6000. Therefore, given a budget of $1800 for fuel and an assumed cost of 30 cents per mile, an individual would be able to travel a maximum of 6000 miles over the course of an entire year.
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Consider the two court cases discussed in this module. Why is the analysis used in the first court case an example of statistical inference, but the analysis in the second court case is not? The first case draws a conclusion based on probability. The first case involves 1025 students instead of only 88 students. The first case uses proportion of matches on wrong answers instead of all answers. D Question 2 2 pts 3 I9060 E- E R SATIRERER
The analysis used in the first court case is an example of statistical inference and the second court case is not an example of statistical inference.
The analysis used in the first court case is an example of statistical inference because it involves drawing a conclusion based on probability. It utilizes statistical techniques to make inferences about the entire population based on a sample.
In this case, the conclusion about cheating on the test was made by comparing the proportion of matches on wrong answers between the two groups.
On the other hand, the analysis in the second court case is not an example of statistical inference.
This is because it does not involve drawing conclusions based on probability or using statistical techniques to make inferences about a larger population. The fact that the second case involves 1025 students instead of only 88 students does not necessarily make it an example of statistical inference.
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3. Triangle ABC is an equilateral triangle (all angles are equal and all side lengths are equal) and triangle CDE is a right triangle. If the length of side AE is 20 units, what is the length of side BD.
A - 12 units
B - 14 units
C - 16 units
D - 18 units
E - 20 units
The correct option is B - 14 units.
Triangle ABC and triangle CDE are shown below. Side AE is a hypotenuse to the right triangle CDE whose right angle is at vertex D. We are to find the length of side BD. We will proceed to solve this problem by making use of Pythagorean Theorem.Let a side of the equilateral triangle ABC be x units, then the other two sides of the triangle will also be x units. Since it is an equilateral triangle, all its sides are equal, and all its angles are equal.
Therefore, angle BAC = angle ABC = angle ACB = 60°.Also, we know that side AE is 20 units. Let the length of side BD be y units.Now, we will use Pythagorean Theorem to find the length of side BD:BD2 + DE2 = BE2DE = AE - AD = 20 - xNow, since triangle ABC is an equilateral triangle, we have:x2 + x2 - 2xcos 60° = 20²2x2 - x² = 400∴ 3x² = 400∴ x² = 400/3∴ x = (400/3)1/2Putting this value of x into the expression for DE, we get:DE = 20 - x = 20 - (400/3)1/2Now, we can substitute the value of DE and x into the expression for BD2:BD2 + (20 - (400/3)1/2)2 = (400/3)This expression simplifies to:BD2 = (400/3) - 400 + 400/3∴ BD2 = 400/3 - 400/3∴ BD2 = 400/9∴ BD = (400/9)1/2.
Therefore, the length of side BD is:BD = (400/9)1/2 ≈ 6.66 units (rounded off to 2 decimal places)In option A, the length of side BD is given as 12 units. But, as we have shown, the length of side BD is approximately 6.66 units. Hence, option A is incorrect.The correct option is B - 14 units.Answer: B - 14 units.
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A truck's 42-in.-diameter wheels are turning at 505 rpm. Find the linear speed of the truck in mph: miles/hour Write answer as an exact expression using pi for a. No need to simplify
The linear speed of the truck is 199.5π/88 mph.
The circumference of each wheel is:
C = πd = π(42 in.) = 42π in.
The distance the truck travels in one revolution of the wheels is equal to the circumference of the wheels. Therefore, the distance the truck travels in one minute is:
d = 42π in./rev × 505 rev/min = 21159π in./min
To convert this to miles per hour, we need to divide by the number of inches in a mile and the number of minutes in an hour:
d = 21159π in./min × (1 mile/63360 in.) × (60 min./1 hour) = 199.5π/88 miles/hour
So, the linear speed of the truck is 199.5π/88 mph.
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What is 4x+3 answer for math homework please answer or else
The the answer to the expression 4x + 3 is simply 4x + 3 itself.
4x + 3 is an algebraic expression that represents a polynomial. It can be simplified or evaluated depending on the given problem. If there are no instructions given, then we assume that the expression is to be simplified. Hence, we must combine like terms. 4x and 3 cannot be combined as they are not like terms. Therefore, the expression is already in its simplest form.
All algebraic expressions are not polynomials, though. But algebraic expressions are what all polynomials are. The distinction is that algebraic expressions also include irrational numbers in the powers, whereas polynomials only include variables and coefficients with the mathematical operations (+, -, and ).Additionally, algebraic expressions may not always be continuous (for example, 1/x2 - 1), whereas polynomials are continuous functions (for example, x2 + 2x + 1).
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recall the notion of average value from one-variable calculus: if is a continuous function, then the average value of f on the closed interval [a, b] is
The average value of a continuous function f on the closed interval [a, b] is equal to the definite integral of f over [a, b], divided by the length of the interval [a, b].
Let f(x) be a continuous function on the interval [a, b]. The average value of f on [a, b] is given by:
AVG = (1/(b-a)) * ∫[a, b] f(x) dx
where ∫[a, b] f(x) dx denotes the definite integral of f(x) over [a, b]. The length of the interval [a, b] is given by (b-a). Therefore, the average value of f on [a, b] is the ratio of the definite integral of f over [a, b] to the length of the interval [a, b]. This formula holds for any continuous function f on [a, b].
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Meghan reads 1/3 of her book in 1 1/4 hours. meghan continues to read at this pace. how long does it take meghan to read 1/2 of the book?
Meghan takes 1 1/4 hours to read 1/3 of her book. At this pace, it will take her 2 1/2 hours to read the entire book. Therefore, it will take her 1 1/4 hours to read 1/2 of the book.
To find out how long it will take Meghan to read the entire book, we can set up a proportion based on the fraction of the book she reads in a given time. If Meghan reads 1/3 of the book in 1 1/4 hours, we can set up the following proportion:
(1/3 book) / (1 1/4 hours) = (1 book) / (x hours)
To solve for x, we can cross-multiply and then divide:
(1/3) * (x hours) = (1) * (1 1/4 hours)
x/3 = 5/4
Next, we can multiply both sides of the equation by 3 to isolate x:
x = (5/4) * 3
x = 15/4
x = 3 3/4 hours
So, it will take Meghan 3 3/4 hours to read the entire book.
To determine how long it will take her to read 1/2 of the book, we can divide the total time by 2:
(3 3/4 hours) / 2 = 15/4 hours / 2
= (15/4) / 2
= (15/4) * (1/2)
= 15/8
= 1 7/8 hours
Therefore, it will take Meghan 1 7/8 hours, or 1 1/4 hours, to read 1/2 of the book.
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use the squeeze theorem to find the limit of each of the following sequences.
cos (1/n) -1
1/n
Using the squeeze theorem, we found that the limit of the sequence cos(1/n) -1 as n approaches infinity is 0, and the limit of the sequence 1/n as n approaches infinity is also 0.
To use the squeeze theorem to find the limit of a sequence, we need to find two other sequences that "squeeze" the original sequence, meaning they are always greater than or equal to it and less than or equal to it. Then, if these two sequences both converge to the same limit, we know the original sequence also converges to that limit.
For the sequence cos(1/n) -1, we can use the fact that -2 ≤ cos(x) - 1 ≤ 0 for all x. Therefore, we can rewrite the sequence as:
-2/n ≤ cos(1/n) - 1 ≤ 0/n
Taking the limit as n approaches infinity of each part of the inequality, we get:
lim (-2/n) = 0
lim (0/n) = 0
So, by the squeeze theorem, the limit of cos(1/n) -1 as n approaches infinity is 0.
For the sequence 1/n, we can simply see that as n approaches infinity, the denominator gets larger and larger, so the fraction gets smaller and smaller. Therefore, the limit of 1/n as n approaches infinity is 0.
In summary, using the squeeze theorem, we found that the limit of the sequence cos(1/n) -1 as n approaches infinity is 0, and the limit of the sequence 1/n as n approaches infinity is also 0.
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A simple random sample is selected in a manner such that each possible sample of a given size has an equal chance of being selecteda. Trueb. False
The statement "A simple random sample is selected in a manner such that each possible sample of a given size has an equal chance of being selected" is:
a. True
A simple random sample ensures that every possible sample of the specified size has an equal likelihood of being chosen, which promotes a fair representation of the entire population.
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A state fisheries commission wants to estimate the number of bass caught in a given lake during a season in order to restock the lake with the appropriate number of young fish. The commission could get a fairly accurate assessment of the seasonal catch by extensive "netting sweeps" of the lake before and after a season, but this technique is much too expensive to be done routinely. Therefore, the commission samples a number of lakes and record the seasonal catch (thousands of bass per square mile of lake area) and size of lake (square miles). A simple linear regression was performed and the following R output obtained.Estimate Std. Error t value Pr(>|t|)(Intercept) 2.5463 0.4427 5.7513 0.0000size 0.0667 0.3672 0.1818 0.8578The response variable is ____.a. size of lakeb. seasonal catch
The response variable in the given linear regression output is seasonal catch, as indicated by the coefficient estimate and standard error of the variable "size."
The response variable in this simple linear regression is the seasonal catch (thousands of bass per square mile of lake area). In a linear regression, the response variable is the variable we are trying to predict or estimate based on the values of other variables. In this case, we are trying to estimate the seasonal catch of bass in the lake based on the size of the lake. So, the correct answer is b. seasonal catch.
The response variable in the given linear regression output is seasonal catch, as indicated by the coefficient estimate and standard error of the variable "size."
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The hypotheses h0: m = 350 versus ha: m < 350 are examined using a sample of size n = 20. the one-sample t statistic has the value t = –1.68. what do we know about the p-value of this test?
The p-value of the test examining the hypotheses H0: μ = 350 vs Ha: μ < 350 with a sample size of n = 20 and a t-statistic of t = -1.68 is greater than 0.05 but less than 0.10.
In this one-sample t-test, you have a null hypothesis H0: μ = 350 and an alternative hypothesis Ha: μ < 350. You are given a sample size of n = 20 and a t-statistic of t = -1.68. To determine the p-value, you need to find the area to the left of the t-statistic in the t-distribution with n-1 (19) degrees of freedom.
Using a t-table or calculator, you can determine that the p-value is between 0.05 and 0.10. A p-value greater than 0.05 indicates that the result is not statistically significant at the 5% level, meaning you cannot reject the null hypothesis.
However, since the p-value is less than 0.10, you could consider the result as weak evidence against the null hypothesis at the 10% level.
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=
√
6 in
8
V
Wota
8 in
What is the perimeter of the triangle?
X
Perimeter (inches)
Check Answer
X
Answer:
the awnser is 24in
Step-by-step explanation:
c^2=a^2+b^2
c^2=6^2+8^2
c^2=36+64
c=10
P= a+b+c
P=6+8+10=24
Answer:
24 inches
Step-by-step explanation:
24 inches