Ask question

Ask question

All categories

3 years ago

13

The top of a square box has an area of 121 cm2. What is the length of one side of the box? A) 9.0 cm B) 11.0 cm C) 15.125 cm D)

30.25 cm

2 answers:

tekilochka [14]3 years ago

5 0

B. 11.0 cm, since the area of a square is x^2. 11.0 x 11.0 is 121. So that means one of the sides is 11.0

julsineya [31]3 years ago

3 0

The answer is B)11.0 square inches.

You might be interested in

A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than ex

amm1812

Answer:

6546 students would need to be sampled.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

The dean randomly selects 200 students and finds that 118 of them are receiving financial aid.

This means that $n = 200, \pi = \frac{118}{200} = 0.59$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a p-value of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

If the dean wanted to estimate the proportion of all students receiving financial aid to within 1% with 90% reliability, how many students would need to be sampled?

n students would need to be sampled, and n is found when M = 0.01. So

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

$0.01 = 1.645\sqrt{\frac{0.59*0.41}{n}}$

$0.01\sqrt{n} = 1.645\sqrt{0.59*0.41}$

$\sqrt{n} = \frac{1.645\sqrt{0.59*0.41}}{0.01}$

$(\sqrt{n})^2 = (\frac{1.645\sqrt{0.59*0.41}}{0.01})^2$

$n = 6545.9$

Rounding up:

6546 students would need to be sampled.

3 0

3 years ago

I NEED HELP pLS What is the value of x? (only number values) *

Licemer1 [7]

Answer:

x=-1

Step-by-step explanation:

By adding the bottom lines you can get

2x+11 = x+10

Simplifying this gets you

x=-1

4 0

3 years ago

5/8 + 3/5 greater than 1 or less than 1

Alex73 [517]

Answer:

Step-by-step explanation:

5/8 + 3/5 =

25/40 + 24/40 =

49/40 = 1 9/40

its greater then 1

8 0

3 years ago

NEED HELP ASAP THIS IS A TEST<br><br> will mark brainlest <br><br> NO LINKS

Nataly_w [17]

-371 7/24
From quizlet made from balletskye20 with 16 terms

8 0

3 years ago

If parallelogram ABCD was reflected over the y-axis, reflected over the x-axis, and rotated 180°, where would point A' lie?

LuckyWell [14K]

D (-4 , -1)
relflected over x-axis= (4 , 1)
180 degrees= (-4 , -1)

6 0

3 years ago