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3 years ago

PLEASEEEE HELP ON ANY QUESTION I WILL GIVE U THE REALLY GOOD REVIEW

Mathematics

1 answer:

Aleksandr [31]3 years ago

5 0

Answer:

C. 3 to 18, 5 to 30 is equal

Step-by-step explanation:

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Plz someone answer these 2 questions.

Elan Coil [88]

Answer:

First one: 0.4

Second one: 4

Step-by-step explanation:

We find the cube root of 0.064 which is 0.4

In order to find the length of side s, we just cube root 64 because it is $s^{3}$

3 0

3 years ago

Read 2 more answers

URGENT: statistics: A researcher wishes to estimate the percentage of adults who support abolishing the penny what size sample s

irina1246 [14]

Using the margin of error for the z-distribution, the sample sizes are given as follows:

a) 822.

b) 1068.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

The margin of error is given by:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

We have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.

Item a:

The estimate is of $\pi = 0.26$ , hence we solve for n when M = 0.03.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.26(0.74)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.26(0.74)}$

$\sqrt{n} = \frac{1.96\sqrt{0.26(0.74)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.96\sqrt{0.26(0.74)}}{0.03}\right)^2$

n = 821.2

A sample of 822 is needed.

Item b:

No prior estimate, hence $\pi = 0.5$ .

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.5(0.5)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.5(0.5)}$

$\sqrt{n} = \frac{1.96\sqrt{0.5(0.5)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.96\sqrt{0.5(0.5)}}{0.03}\right)^2$

n = 1067.11

A sample of 1068 is needed.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

4 0

2 years ago

Bob has 56 bars of candy. He eats75%. What does he have.

s344n2d4d5 [400]

The answer is B, but C is a pretty good answer too.LOL.

8 0

4 years ago

The length of a rectangle is five times its width. The perimeter of the rectangle is at most 96 cm. Which inequality models the

aivan3 [116]

Let

L--------> the length of the rectangle

W-------> the width of the rectangle

we know that

the perimeter of the rectangle is equal to

$P=2L+2W$

$P\leq 96\ cm$

$(2L+2W)\leq 96$ ---------> equation $1$

$L=5W$ ---------> equation $2$

Substitute equation $2$ in equation $1$

$2*(5W)+2W\leq 96$

therefore

<u>the answer is the option</u>

2w+2⋅(5w)≤96

7 0

3 years ago

Read 2 more answers

Suppose the side lengths are multiplied by 6 describe the change in the perimeter

noname [10]

Can you explain more? Sounds like you're missing parts of the problem

8 0

3 years ago

Read 2 more answers