Can someone please help me with this question
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The correct statement is C.) The proportion of the variation in height that is explained by a regression on age is 0.64.

The coefficient of determination (R2), which ranges from 0 to 1, expresses how accurately a statistical model forecasts a result.

The correlation Coefficient R = 0.8,  which demonstrates the strong correlation between children's age and height. With the correlation coefficient value, we can calculate the coefficient of determination (R2), which indicates the proportion of variation that the regression model can account for.

Coefficient of determination \((R^{2} ) = 0.8^{2}\)

= 0.64.

0.64 of the variation in children's height that can be attributed to age and 0.36 to other factors.

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missing Options :

A.) On average, the height of a child is 80% of the age of the child.

B.) The least-squares regression line of height versus age will have a slope of 0.8.

C.) The proportion of the variation in height that is explained by a regression on age is 0.64.

D.) The least-squares regression line will correctly predict height based on age 80% of the time.

E.) The least-squares regression line will correctly predict height based on age 64% of the time.

A. The number of red balls he had was 8  at the beginning.

Duke's starting red ball total can be found by setting up a system of equations. First, let x represent the number of red balls and y represent the number of blue balls.

After 5 days, the equation is x-15=y+10. This equation states that after 5 days, the number of red balls (x) minus 15 will equal the number of blue balls (y) plus 10. After 9 days, the equation is x-27=2y+20.

This equation states that after 9 days, the number of red balls (x) minus 27 will equal twice the number of blue balls (y) plus 20. To solve for x, both equations can be set equal to each other and solved. This results in x=8. Therefore, Duke had 8 red balls at the beginning.

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We can proceed with conducting a z-test for one proportion to test whether the true proportion of players who win the game differs from 0.10.

What is Algebraic expression ?

Algebraic expression can be defined as combination of variables and constants.

Yes, the conditions for inference are met for conducting a z-test for one proportion.

The random condition is met because the sample is chosen randomly from the large population of all players.

The 10% condition is also met since the sample size (100) is less than 10% of the entire population.

The large counts condition is met because both np and n(1-p) are greater than or equal to 10, where n is the sample size and p is the hypothesized proportion of players who win the game. In this case, np = 100 * 0.1 = 10 and n(1-p) = 100 * 0.9 = 90.

Therefore, we can proceed with conducting a z-test for one proportion to test whether the true proportion of players who win the game differs from 0.10.

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The relation is

Answer:

16

Step-by-step explanation:

Substituting 16 will make the expression valid and correct since the square of -4 is 16 and the addition of it is -8.

\(v^2-8v+16=(v-4)^2\)

Answer:

7 = r

Step-by-step explanation:

The circumference of a circle is given by

C = 2 * pi *r

14 pi = 2 * pi *r

Divide each side by 2 pi

14 pi/ (2 pi) = 2 * pi *r / (2 pi)

7 = r

The process of finding distances using similar triangles is called "indirect measurement." This technique is commonly used in fields such as engineering, architecture, and surveying.

Indirect measurement involves creating a scale drawing of the object or space in question, using known dimensions and ratios to create a proportional representation. This drawing is then used to create similar triangles, which can be used to calculate distances and other measurements.

For example, if you want to measure the height of a building, you can create a scale drawing of the building and its surroundings, and use trigonometry to calculate the height of the building based on the length of its shadow and the angle of the sun.

Indirect measurement can be a powerful tool for solving complex problems and making accurate measurements in situations where direct measurement is not possible. However, it does require a strong understanding of geometry and mathematical concepts, as well as careful attention to detail and accuracy in creating the scale drawing.

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It is possible for a measure to be highly reliable but not valid.

Reliability refers to the consistency and stability of measurements, indicating that the measure produces consistent results over multiple administrations or across different raters.

On the other hand, validity refers to the extent to which a measure accurately assesses the intended construct or concept.

A measure can be reliable if it consistently produces the same results, even if those results do not accurately reflect the concept being measured.

For example, if a thermometer consistently shows a temperature reading that is consistently 5 degrees higher than the actual temperature, it is reliable (consistent) but not valid (accurate).

In research, it is crucial to strive for measures that are both reliable and valid to ensure accurate and meaningful results.

However, it is important to recognize that reliability and validity are separate properties, and a measure can have one without the other.

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For 1st row

For 3 Rd row

For last row

Answer:

The only complete ordered pair in the given table is:

5 months → $60 saved

Therefore, to determine the relationship between the variables, divide the amount saved by the number of months:

\(\implies \sf \dfrac{Amount\:saved}{Number\:of\:months}=\dfrac{\$60}{5}=\$12\)

So we can assume that $12 is saved each month.

To complete the table:

⇒ 3 × $12 = $36

⇒ $72 ÷ $12 = 6

⇒ 10 × $12 = $120

Completed table:

\(\large\begin{array}{| c | c |}\cline{1-2} \sf Times\:(month) & \sf Amount\:Saved\: (\$) \\\cline{1-2} 3 & 36 \\\cline{1-2} 5 & 60 \\\cline{1-2} 6 & 72 \\\cline{1-2} 10 & 120 \\\cline{1-2} \end{array}\)

Some examples of he most common types of retirement accounts are:

The 401 (k) is a type of requirement plan that allows employees to contribute a percentage of their wages to individual accounts. Some of it's features are:

The term 401(k) is derived from the section of the US Internal Revenue Code that established the 401(k) retirement plan.

SEP is the accronym for Simplified Employee Pension. SEP IRA is a retirement savings plan a sort of domesticated plan that employers created to the advantage of themselves and their employees.

The advantages of the SEP IRA are:

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We will break apart the figure into triangles, rectangles, squares etc. We will then find area of each individual figure and sum it.

We can break apart the figure as shown below:

Answer:

60 min

Step-by-step explanation:

120 divided by 2= 60

Step-by-step explanation:

Probability of A  is  10 + 5  =15

Probability of B is   9 + 5   ( but you already counted the '5')  

 so just count   9

9+ 15 = 24

  this is  24 out of     16 + 10 + 5 + 9 = 40

      or    24/40   which reduces to 3/5   or  .6   or  60%

Using the equation given:

P(A) + P(B) - P(A and B)

  15  + 14    - 5    = 24       this is out of the entire number 40

               24/40 = same as above

Answer: OPTION 3 i think sorry

and please dont kus

Step-by-step explanation:

Answer:

y=9x^2+2x-48

Step-by-step explanation:

Answer:

x=3

Step-by-step explanation:

f(x)=2x+6

f(x)=12

Hence:

2x+6=12

2x+6-6=12-6

2x=6

x=6/2

x=3

Answer:

The slope would be 4/5.

The rate at which the top of the ladder is slipping down at the instant when the bottom of the ladder is 15 feet from the base of the building is -75/8 feet per second

The length of the ladder = 17

Consider the length of the base as x and the height is h

The rate at which the ladder is sliding = 5 feet per second

dx/dt = 5

Apply the Pythagorean theorem

x^2 + h^2 = 17^2

h^2 = 289 - x^2

h = \(\sqrt{289-x^2}\)

The rate of change of height with respect to x is

dh/dx = - x / (289 - x^2)^(1/2)

dh/dt = dh/dx × dx/dt

Substitute the values in the equation

= - 15 / (289 - 15^2)^(1/2) × 5

= -15/8 × 5

= -75/8 feet per second

Therefore, the rate of change of height when x = 15 is -75/8 feet per second

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Answer:

41

Step-by-step explanation:

A = LW + (1/2)bh

A = 7 m × 5 m + (1/2)(3 m)(4 m)

A = 35 m² + 6 m²

A = 41 m²

Equivalent expressions are expressions of equal values

The simplified expression of (3 - 4i) + (7 - 6i) is \(10- 10i\)

The expression is given as:

\((3 - 4i) + (7 - 6i)\)

Remove brackets in the above expression

\(3 - 4i + 7 - 6i\)

Rewrite the expression by collecting the like terms

\(3 + 7- 4i - 6i\)

Next, evaluate the like terms

\(10- 10i\)

Hence, the simplified expression of (3 - 4i) + (7 - 6i) is \(10- 10i\)

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Answer:

714 is the total number that is sold, if there is 64 more tickets sold for students then adults, then do 714 divided by 2 and add 32 to get the number for students, and for adults do 714 divided by 2 and subtract by 32. so, like this 714/2+32=389 tickets for students and 714/2-32=325 for adults. Hope this helps

Answer:

The adult tickets total were 293

Step-by-step explanation:

714 divided by 2 ( because there is only 2 types of tickets )  and 714 divided by 2 equals 357 ad because the student tickets sold better 357 minus 64 = 293 and you prove that by multyplying 357 x 2 = 714

your welcome :)

Answer:

10^3

Step-by-step explanation:

Answer:

10^3

Step-by-step explanation:

count how many 10s are there and that is the answer

(there are 3 tens so put the power as 3)

To check 10 X 10 X 10 is 1000

10^3 is 1000

Answer:

85 square feet

Step-by-step explanation:

what we know: complete 6.8 square feet every hour

what we want to know: how much square feet will be compeletein 12 1/2 hours?

12 1/2 is 12.5

6.8 square feet time 12.5 hours gives you 85 square feet :)

Answer:

the answer is D

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

ANY EXPLANATIONS? I'D BE READY TO HELP.

If the trend had continued unchecked, the number of people which would have died from AIDS in 2007 will be: 339,448,671 people.

Exponential growth is the process by which quantity increases over time. It happens when the instantaneous rate of change of a quantity with respect to time is proportional to the quantity itself. A quantity undergoing exponential growth is an exponential function of time, which means that the variable representing time is the exponent (in contrast to other types of growth, such as quadratic growth).

The basic exponential growth function is: f(t) = a·bt

f (t) = number of cases at year t

a = starting value = 1000 in 1983

b = growth factor = 1.7

t = years since 1983 = 2007 - 1983 = 24

f(t) = 1000·(1.7)^24

f(t) = 339448671.315

f(t) = 339,448,671

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Answer:

A

Step-by-step explanation:

I think though im not sure

Answer:

O B. (2x+3)(x + 4)

Step-by-step explanation:

\(2x^{2} +11x+12\)

\(2x^{2} +8x+3x+12\)

\(2x(x+4)+3(x+4)\)

\((2x+3)(x+4)\)

The experimental probability of landing on a number greater than 4 is 0.25 or 25%.

To find this probability, we need to determine the number of successful outcomes (landing on a number greater than 4) and divide that by the total number of trials (60).

The successful outcomes are 5 and 6, with a frequency of 10 and 8 respectively. To add these two frequencies together, we can use 10 + 8 = 18.

So, the experimental probability is 18/60 = 0.3 or 25%.

It's important to note that experimental probability is based on the outcomes of an experiment or a sample and it may not be the same as a theoretical probability which is based on the ratio of favorable outcomes to the total number of outcomes in a theoretical model.

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the answer in fraction form is 18/60

if thats what you are looking for.