A quiz has 3 questions. Each question has 4 choices; a, b, c, or d. How many outcomes for answering the three questions are possible?

Out of the 500 teenagers sampled at random, the table presents their preferences in terms of favorite movie genres. To estimate the number of teenagers out of a population of 3,000 who prefer action movies, we can use the proportion of action movie fans from the sample.

Let's say the table shows that "x" out of the 500 sampled teenagers prefer action movies. To find the proportion of action movie fans in the sample, we divide the number of action movie fans by the total number of teenagers in the sample:

Proportion of action movie fans = (x / 500)

Now, we can use this proportion to estimate the number of teenagers who prefer action movies in the entire population of 3,000 teenagers. To do this, multiply the proportion of action movie fans by the total population:

[tex]Estimated action movie fans = Proportion of action movie fans * Total population[/tex]

Estimated action movie fans = (x / 500) * 3,000

By calculating this value, we can estimate the number of teenagers in the population of 3,000 who will prefer action movies based on the results of the random sample.

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Answer:

the Riemann Sum for $f(x)=2x^2$ with four equal subintervals using right-hand endpoints as the sample points is $\frac{15}{2}$.

Step-by-step explanation:

To evaluate the Riemann Sum for the function $f(x)=2x^2$ with four equal subintervals using right-hand endpoints as the sample points, we first need to determine the width of each subinterval. Since we have four subintervals to cover the interval $[0, 2]$, each subinterval has a width of $\Delta x = \frac{2-0}{4} = \frac{1}{2}$.

Next, we need to choose a sample point from each subinterval to evaluate the function. Since we are using right-hand endpoints as the sample points, we choose the endpoint of each subinterval as the sample point. The four subintervals are:

$[0, \frac{1}{2}]$, with sample point $x_1 = \frac{1}{2}$

$[\frac{1}{2}, 1]$, with sample point $x_2 = 1$

$[1, \frac{3}{2}]$, with sample point $x_3 = \frac{3}{2}$

$[\frac{3}{2}, 2]$, with sample point $x_4 = 2$

The Riemann Sum is then given by:

∑i=14f(xi)Δx=f(x1)Δx+f(x2)Δx+f(x3)Δx+f(x4)Δx=2(12)2⋅12+2(1)2⋅12+2(32)2⋅12+2(2)2⋅12=12+2+92+4=152i=1∑4​f(xi​)Δx​=f(x1​)Δx+f(x2​)Δx+f(x3​)Δx+f(x4​)Δx=2(21​)2⋅21​+2(1)2⋅21​+2(23​)2⋅21​+2(2)2⋅21​=21​+2+29​+4=215​​

Therefore, the Riemann Sum for $f(x)=2x^2$ with four equal subintervals using right-hand endpoints as the sample points is $\frac{15}{2}$.

The Riemann Sum is 15/2 or 7.5.

To evaluate the Riemann Sum for the function f(x) = 2x^2 on the interval [0, 2] using 4 equal subintervals and right-hand endpoints, follow these steps:

1. Determine the width of each subinterval:
  Δx = (b - a) / n = (2 - 0) / 4 = 0.5

2. Identify the right-hand endpoints of each subinterval:
  x1 = 0.5, x2 = 1, x3 = 1.5, x4 = 2

3. Evaluate the function at each right-hand endpoint:
  f(x1) = 2(0.5)^2 = 0.5
  f(x2) = 2(1)^2 = 2
  f(x3) = 2(1.5)^2 = 4.5
  f(x4) = 2(2)^2 = 8

4. Calculate the Riemann Sum using these values:
  Riemann Sum = Δx * (f(x1) + f(x2) + f(x3) + f(x4))
  Riemann Sum = 0.5 * (0.5 + 2 + 4.5 + 8)
  Riemann Sum = 0.5 * (15)
  Riemann Sum = 7.5

The Riemann Sum for the given function using 4 equal subintervals and right-hand endpoints is 7.5, which is not among the provided options. However, the closest answer choice would be 15/2 or 7.5.

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The translational angular momentum of the space junk about location D just before the collision can be found by plugging the values of r_perp and p.

To calculate the translational angular momentum of the space junk about location D, we need to consider its linear momentum and the perpendicular distance from location D to the line of motion.

Step 1: Identify the linear momentum of the space junk
Linear momentum (p) is the product of mass (m) and velocity (v). Assuming we know the mass and velocity of the space junk, we can find its linear momentum:

p = m * v

Step 2: Determine the perpendicular distance (r_perp) from location D to the line of motion
As mentioned, r_perp remains the same at locations A, B, and just before reaching C.

Step 3: Calculate the translational angular momentum (L) about location D
Translational angular momentum is given by the formula:

L = r_perp * p

Since r_perp and p remain constant at locations A, B, and just before reaching C, the translational angular momentum of the space junk about location D will be the same at all these locations.

So, the translational angular momentum of the space junk about location D just before the collision can be found by plugging the values of r_perp and p into the formula above.

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The appropriate test to use in this situation is a paired t-test. This test is used to determine if there is a significant difference between two related samples, in this case, the same individuals at two different time points.

In this scenario, a paired t-test is the most suitable test because it is used to analyze paired data, where the same individuals are measured or tested at two different time points. The paired t-test takes into account the correlation between the two measurements within each individual and compares the mean difference between the paired observations to determine if there is a statistically significant change over time.

It is commonly used in longitudinal studies, clinical trials with repeated measures, or before-and-after intervention studies, where the focus is on comparing the same individuals' outcomes over time rather than comparing different groups or populations.

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Answer:

Step-by-step explanation:

/,

The ratio 8:73 represents the ratio of 6th grade football players to total athletes. The Option B is correct.

We must add up the number of football players in each grade to get the ratio/

Data:

6th grade: 8 football players

7th grade: 15 football players

8th grade: 10 football players

The total number of football players is:

=  8 + 15 + 10

= 33.

The total number of athletes is:

6th grade: 2 (basketball) + 1 (baseball) + 7 (soccer) + 8 (football) = 18

7th grade: 4 (basketball) + 6 (baseball) + 4 (soccer) + 15 (football) = 29

8th grade: 7 (basketball) + 5 (baseball) + 4 (soccer) + 10 (football) = 26

The total number of athletes is:

= 18 + 29 + 26

= 73.

Therefore, the ratio of 6th grade football players to total athletes is 8:73.

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Between clock skew and clock jitter, skew is preferred because it is more predictable and can sometimes increase max frequency. This makes it easier to manage in electronic systems and can provide benefits in certain scenarios.

Jitter is preferred because it is predictable. Clock jitter refers to the variability of the clock signal and can be predicted and compensated for. On the other hand, clock skew refers to the difference in arrival time of the clock signal at different points in the circuit and can sometimes increase maximum frequency. However, skew is preferred because it is more predictable and can be compensated for, while jitter is preferred because it is unpredictable and can't be compensated for. Therefore, in general, jitter is considered more preferable than skew.

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If the average grade of Group A is significantly higher than that of Group B, it could suggest that using the book helps students pass the statistics class. However, other factors may also contribute to the difference in performance, so further research might be necessary.

we'll conduct an experiment comparing the average grades of two groups of students taking a statistics class. Here's a step-by-step explanation:

1. Randomly select 20 students to form the first group (Group A) who will take the class using the book.
2. Randomly select another 20 students to form the second group (Group B) who will take the class without using the book.
3. At the end of the class, collect the final grades for all students in both groups.
4. Calculate the average grade for Group A (students with the book) by adding their grades and dividing the sum by 20.
5. Calculate the average grade for Group B (students without the book) by adding their grades and dividing the sum by 20.
6. Compare the average grades of both groups to determine if using the book had a significant impact on the students' performance in the statistics class.

If the average grade of Group A is significantly higher than that of Group B, it could suggest that using the book helps students pass the statistics class. However, other factors may also contribute to the difference in performance, so further research might be necessary.

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For the following research situations, specify the type of test you would use.

Possible answers:

Fro

5 sf

-Select-

One sample z

One samplet

Matched Pairst

Independent two samplet

Pooled two samplet

None of the above

E) To see if buying the book helps pass a statistics class 20 students are randomly selected to take the class with the book,

G) A research company has a new drug that will make horses run faster. To test it they have 25 horses take the drug, and 25 hK) A religious study group wants to estimate the average number of verses per chapter in the Bible, so they find online that

Bread has a final price of RD$ 7.

In this problem we know the current price of bread and the rise percentage, from which we have to compute the final price of the product in mention, whose expression is described below:

C' = C × (1 + r / 100)

Donde:

If we know that C = 5 y r = 40, then the final price of bread is:

C' = 5 · (1 + 40 / 100)

C' = 7

The final price of bread is RD$ 7.

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The volume of the prism is 1500 m³.

For calculating the volume of the given prism, we need to calculate the area of the top triangle and the area of the bottom triangle.

Base of the top triangle, b = (7 + 9) / 2 = 8 m

Height of the top triangle, h = 10 m

Area of the top triangle, A = 1/2bh

A = 1/2 x 8 x 10

A = 40 m²

Area of bottom triangle, A' = (1/2) x bh

A' = (1/2) x 12 x 5

A' = 30 m²

Volume of prism, V = height x [A + A' + (2 x Average area of front and back rectangles)]

V = 10 x [(40 + 30 + (2 x (1/2) x 8 x 10)]

V = 1500 m³

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If a researcher finds a small difference in average test scores between a large sample (over 700) of experimental participants and a large sample (same size) of control participants.

It is very likely that the difference is statistically significant but does not have a high degree of meaningfulness. This is because with such a large sample size, even small differences can be statistically significant, but the degree of meaningfulness depends on the magnitude of the difference and the practical significance of the findings. The control group helps to establish a baseline for comparison, but it does not necessarily affect the statistical significance of the results.

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Answer:i think the anwser is 6

Step-by-step explanation:

The area of the surface defined by z = xy and x2 + y2 ≤ 22 would be, Area = ∬ sqrt(1 + r^2) * r dr dθ, with limits 0 ≤ r ≤ sqrt(2) and 0 ≤ θ ≤ 2π.Evaluate the integral to get the area of the surface.

To find the area of the surface defined by z = xy and x^2 + y^2 ≤ 2, we need to use a double integral over the region bounded by the inequality x^2 + y^2 ≤ 2.

First, we should rewrite the inequality in polar coordinates: x^2 + y^2 ≤ 2 becomes r^2 ≤ 2, where r is the radial distance and θ is the angle. This means 0 ≤ r ≤ sqrt(2) and 0 ≤ θ ≤ 2π.

Next, we find the Jacobian for the polar coordinates, which is |J(r,θ)| = r.

Now, we need to compute the magnitude of the gradient of z = xy in terms of polar coordinates. The gradient of z is given by the partial derivatives:

∂z/∂x = y and ∂z/∂y = x

In polar coordinates, x = r*cos(θ) and y = r*sin(θ). So, we have:

∂z/∂r = cos(θ)*∂z/∂x + sin(θ)*∂z/∂y = r*cos^2(θ) + r*sin^2(θ) = r

Now, we use the double integral to find the surface area:

Area = ∬ sqrt(1 + (∂z/∂r)^2) * |J(r,θ)| dr dθ

Area = ∬ sqrt(1 + r^2) * r dr dθ, with limits 0 ≤ r ≤ sqrt(2) and 0 ≤ θ ≤ 2π.

Evaluate the integral to get the area of the surface.

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The two probabilities are:

Here we need to use the Venn Diagram to find the probabilities.

First, the probability of A given B, we can see that set B has 33 elements, of these 33, there are 3 that also belong to A, then the probability is given by the quotient between these two:

P(A given B) = 3/33 = 1/11

For the second case we do the same thing but now look at set A, there are 21 elements and 3 also belong to B

P(B given A) = 3/21 = 1/7

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The coordinate points E=(3, -1) and K=(9, -9) are separated by a distance of 10 units.

The formula for calculating the distance between two points is expressed as:

D = √(x₂-x₁)²-(y₂-y₁)²

Given the following coordinates  E=(3, -1) and K= (9, -9)

Substitute the coordinates into the formula to have:

D = √(3-9)²-(-1-(-9))²

D= √(-6)²-(8)²

D = √36 + 64

D = √100

D = 10 units

Hence the distance between the points E=(3, -1) and K= (9, -9) is 10 units.

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Answer:

9,000

Step-by-step explanation:

Answer: 9,000

Step-by-step explanation:

When the next number over is 5 or above, you round up. This would give you 9,000. If you needed to round to the nearest hundred it would be 8,600 for example.

Answer: 44%

Step-by-step explanation:

Let us assume there were 100 students.

Now, 26% means 26 students have chosen biology, and 18% means 18 students have chosen botany.

Now total number of students who have chosen biology or botany = 44

P(the student has chosen biology or botany as subject for project) = 44/100

The value of upper quartile of the box plot is, 350.

We have to given that;

the Creekview History Museum kept track of how many people visited the museum each day last month.

Now, We know that;

The value of upper quartile of the box plot shown in right side of box.

Hence, By given box plot;

The value of upper quartile of the box plot is,

⇒ 350.

Thus, The value of upper quartile of the box plot is, 350.

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After 25 years, Bill earned $7,323.68 more interest than Jim.

The parameters needed to calculate the balances of each account are given as follows:

Using simple interest, Jim's balance is given as follows:

J(25) = 15000(1 + 0.035 x 25)

J(25) = $28,125.

Hence he earned $13,125 in interest.

Using compound interest, Bill's balance is given as follows:

B(25) = 15000(1.035)^25

B(25) = $35,448.68.

Hence he earned $20,448.68 in interest.

The difference is given as follows:

20448.68 - 13125 = $7,323.68

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The required solution (x, y) = (3, -2) satisfies both equations, and it is the correct solution.

To solve the linear equation -x + 3y = -9 by substitution using the equation y = -2x + 4, we can substitute y in the second equation with -2x + 4 from the first equation, as follows:
-x + 3(-2x + 4) = -9
x - 6x + 12 = -9
-7x = -21
x = 3

Now, we can use the value of x to find the value of y from the first equation,
y = -2x + 4:
y = -2(3) + 4
y = -2

So the solution to the system of equations is (x, y) = (3, -2).

To check the solution, we can substitute the values of x and y in both equations and verify that they are true:
y = -2x + 4 becomes -2 = -2(3) + 4, which is true.
-x + 3y = -9 becomes -3 + 3(-2) = -9, which is also true.

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The expressions that can be used to determine the area of the rectangle are given as follows:

The area of a rectangle is given by the multiplication of the dimensions of the rectangle.

The dimensions in this problem are given as follows:

[tex]\sqrt{32}, \sqrt{45}[/tex]

Hence the area is:

[tex]\sqrt{32} \times \sqrt{45}[/tex]

32 x 45 = 1440, hence the area can also be written as follows:

[tex]A = \sqrt{1440}[/tex]

We can factor 32 and 45, hence:

[tex]\sqrt{32} \times \sqrt{45} = \sqrt{16 \times 2} \times \sqrt{9 \times 5} = 4\sqrt{2} \times 3\sqrt{5} = 12\sqrt{10}[/tex]

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The probability that z ≥ -2.12 can be found using a standard normal distribution table or calculator. The answer is approximately 0.9830.  2. For a sample of 49 elements with a sample mean of 56 and a sample standard deviation of 14, the standard error of the mean is: b. 2

The standard error of the mean can be calculated using the formula:

[tex]standard error = sample standard deviation / square root of sample size[/tex]

In this case, the sample standard deviation is 14 and the sample size is 49. Therefore, the standard error of the mean is:

standard error = 14 / √49
standard error = 14 / 7
standard error = 2

So the answer is (b) 2.

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If a is a positive integer and if the unit's digit of a2 is 9 and (a+1)2 is 4, then the unit's digit of (a+2)2 is 1.

We are given that a is a positive integer, and we need to find the unit's digit of (a+2)². To solve this problem, let's first analyze the information provided:
1. The unit's digit of a² is 9.
2. The unit's digit of (a+1)² is 4.
From the first piece of information, we can conclude that the unit's digit a must be either 3 or 7, as 3² = 9 and 7² = 49 (the unit's digit is 9).
Now, let's check the second piece of information. If the unit's digit of a is 3, then the unit's digit of (a+1) would be 4. Since 4² = 16 (unit's digit is 6), this doesn't match the given condition that the unit's digit of (a+1)² is 4.
So, the unit's digit must be 7. In this case, the unit's digit of (a+1) is 8. Since 8² = 64 (unit's digit is 4), this matches the given condition.
Now that we know the unit's digit of a is 7, let's find the unit's digit of (a+2)². If the unit's digit of a is 7, then the unit's digit of (a+2) is 9. Since 9² = 81 (unit's digit is 1), the unit's digit of (a+2)² is 1.
Therefore, the correct answer is:
A) 1

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(a) Confidence Interval: (0.576, 0.624)

(b) Source: Pew Research Center. "Views of Gun Policy by Party, Ideology." Retrieved from: https://www.pewresearch.org/fact-tank/2021/06/08/support-for-stricter-gun-control-declines-from-2019-levels/

(c) This confidence interval is trying to estimate the proportion of U.S. adults who support stricter gun control laws in 2021.

(d) The confidence interval was published by Pew Research Center, a nonpartisan fact tank that conducts public opinion polling, demographic research, and content analysis. Their purpose was to provide an understanding of the American public's views on gun control policies.

(e) Confidence Level: 95%; Sample Size: 5,109 U.S. adults; Sampling Method: Random sampling.

(f) The sample for this study were the 5,109 U.S. adults who participated in the survey. The population for the study is the entire U.S. adult population.

(g) The transparency and trustworthiness of the figures used are quite high, as Pew Research Center is a well-known and reputable organization that follows strict methodology and data quality guidelines. They provide information on their sampling method, sample size, and confidence level, which allows readers to assess the reliability of their findings.

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Answer:

D. 12 units

Step-by-step explanation:

For a point to be translated x units to the left, we must subtract x from the original point, so the x coordinate for M' is -4 as 4 - 8 = -4

For a point to be translated x units down, we must subtract x from the original point, so the y coordinate for M' is -3 as 6 - 9 = -3

Thus, the coordinates for M' is (-4, -3)

The formula for distance, d, between two points is

[tex]d=\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }[/tex], where (x1, y1) is one point and (x2, y2) is another point.

If we allow M (4, 6) to be our x1 and y1 point and M' (-4, -3) to be our x2 and y2 point, we can find the distance between the two points:

[tex]d=\sqrt{(4-(-4))^2+(6-(-3))^2}\\ d=\sqrt{(4+4)^2+(6+3)^2}\\ d=\sqrt{(8)^2+(9)^2}\\ d=\sqrt{64+81}\\ d=\sqrt{145}\\ d=12.04159458[/tex]

Step-by-step explanation:

It is a CUBE   so each of the SIX sides has area   2/3  X  2/3

the TOTAL area is then    SIX * (2/3 X 2/3) = 2 2/3 units^2

All the solutions of the logarithmic function,

a. log₃(27) = 3 because 3³ = 27.

b.  log₂(2,048) = 11 because 2¹¹ = 2,048.

c. log₃(1/81) = -4 because 3⁻⁴ = 1/81.

d.  log₂(1) = 0 because 2⁰ = 1.

e.  log₁₀(1/10) = -1 because 10⁻¹ = 1/10.

f. log₆(6) = 1 because 6¹ = 6.

g. log₃(3k) = 1 + log₃k

(a) The expression is log₃ (27),

Now, the exponent to which 3 must be raised to obtain 27.

Since 3³ = 27

log₃ (27) = log₃ (3³)

              = 3 log₃3

              = 3

log₃(27) = 3 because 3³ = 27.

(b) Similarly, to find log_2(2,048), we need to determine the exponent to which 2 must be raised to obtain 2,048.

Since 2¹¹ = 2,048

Here, we have;

log₂(2,048) = log₂ (2¹¹)

                   = 11 log₂ (2)

                   = 11

log₂(2,048) = 11 because 2¹¹ = 2,048.

(c) For log₃(1/81), we need to determine the exponent to which 3 must be raised to obtain 1/81.

Since 3⁻⁴ = 1/81

So, we have

log₃(1/81) = -4 because 3⁻⁴ = 1/81.

(d) In the case of log₂(1), we need to determine the exponent to which 2 must be raised to obtain 1.

Since any number raised to the power of 0 equals 1, we have;

log₂(1) = 0 because 2⁰ = 1.

(e) For log₁₀(1/10), we need to determine the exponent to which 10 must be raised to obtain 1/10.

Since 10⁻¹ = 1/10

Hence, we have;

log₁₀(1/10) = -1 because 10⁻¹ = 1/10.

(f) When calculating log₆(6), we need to determine the exponent to which 6 must be raised to obtain 6.

Since any number raised to the power of 1 is equal to itself, we have

log₆(6) = 1 because 6¹ = 6.

(g) Lastly, for log₃(3k)

log₃(3k) = log₃3 + log₃k

             = 1 + log₃k

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The logarithm method is used to determine the number of times to multiply the base number to obtain another number. The given expressions convert into respective powers of the base to give the final exact values. The values obtained depict the fundamental property of logarithms.

The logarithm function is a method of determining how many times one number must be multiplied by itself to reach another number. It is usually denoted as logb(x), where 'b' is the base, 'x' is the result of the multiplication, and the result of the log function is the number of times we need to multiply.

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Answer: decay by 2%

Step-by-step explanation:

It is decay because it is under 1.

as for the decay rate, you subtract 1 - 0.98 = 0.02

Multiply to get the percent

0.02 x 100 = 2%

The slope of the secant line between x1 = 1 and x2 = 3 for the given function f(x) = 43x - 1 is 87/2.

y = f(x)

F(x)=43x−1

x1 = 1

x2 = 3

It is given that the slope of the secant line between two points (x1, f(x1)) and (x2, f(x2)) on a curve y=f(x) as:

slope = [fun(x2) - fun(x1)] ÷ (x2 - x1)

Assuming the values x1 = 1, x2 = 3, we can find the slope of the secant line between x1 and x2 as:

slope = fun(x2) - fun(x1)) ÷ (x2 - x1)

slope = (43(3) - 1 - [43(1) - 1]) ÷ (3 - 1)

slope  = (129 - 42) ÷ 2

slope  = 87/ 2

Therefore, we can conclude that the slope of the given secant line between x1 = 1 and x2 = 3 for the function f(x) = 43x - 1 is 87/2.

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The value of z in the polynomial function f(x) = x²- 9x + z is 0.

The vertex of a parabola in form f(x) = a(x-h)² + k is (h,k), and the x-coordinate of the vertex is given by -b/2a for a quadratic function in form f(x) = ax² + bx + c.

From the given information, we know that the vertex of f(x) is (4.5,-2.25), so we can write:

f(x) = a(x-4.5)² - 2.25

We also know that f(x) has a zero at (3,0), so we can write:

0 = a(3-4.5)² - 2.25

0 = a(2.25) - 2.25

a = 1

Substitute this value of a = 1 into the equation for f(x),

f(x) = (x-4.5)^2 - 2.25 + z

We know that f(x) has a zero at x=3, so we can substitute x=3 and set f(3) equal to zero:

0 = (3-4.5)² - 2.25 + z

0 = 2.25 - 2.25 + z

z = 0

Therefore, the value of z in the polynomial function is 0.

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A curvilinear association is a non-linear relationship between two variables, but a correlation coefficient of zero (or close to zero) does not guarantee a curvilinear relationship, as it only indicates the absence of a linear relationship.

A curvilinear association is a relationship between two variables where the pattern of their association is not a straight line. However, the correlation coefficient being zero (or close to zero) indicates no linear relationship between the variables, but it does not necessarily imply a curvilinear association. A curvilinear association can have a non-zero correlation coefficient, depending on the nature of the curve.
No, that statement is not entirely accurate. A curvilinear association refers to a relationship between two variables that is not linear, meaning it cannot be described by a straight line. However, the correlation coefficient can still be calculated for a curvilinear relationship, and it may or may not be close to zero. In fact, there are different types of curvilinear relationships, some of which can have a strong correlation coefficient.

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The intensity of light will be  0.308%

We know that the intensity of the light is given by the formula:

I(d) = 100d⁻²

We want to find the intensity of the light 18 cm from the source, so we just need to evaluate our formula in d = 18, we will get:

I(18) =  100*18⁻² = 0.308

That is the intensity of light at 18cm from the source.

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