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2 years ago

Help me plssssss im stuck I will give brainly

Mathematics

2 answers:

ozzi2 years ago

5 0

Answer:

Kate.

Step-by-step explanation:

garik1379 [7]2 years ago

3 0

Answer:

Kate, 29.26 is correct

Step-by-step explanation:

99.91 - 70.65 is 29.26

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There is only one freshman in the cast of a high school play. There are 6 sophomores and 11 juniors. One third of the cast are s

Rudik [331]

Let X = total students in musical

Then (1/3) X = number of seniors

1 + 6 + 11 + (1/3)X = X

18 + (1/3)X = X

18 = (2/3)X

(3/2)(18) = X

27 = X

27 students in musical of which one third are seniors,

there are 9 seniors in musical

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6 0

2 years ago

Help fast plz 100 points!

antoniya [11.8K]

No because root(3)(x+8+1) is equal to x^3 -9 and (x-1)^3+8 is equal to root (3)(√x−8−1)

8 0

2 years ago

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A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

lara31 [8.8K]

Answer:

The sample size is 1875.

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 zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

Sampling error of 0.03.

This means that $M = 0.03$

99.74% confidence level

So $\alpha = 0.0026$ , z is the value of Z that has a pvalue of $1 - \frac{0.0026}{2} = 0.9987$ , so $Z = 3$ .

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

What is the sample size

The sample size is n. So

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

$0.03 = 3\sqrt{\frac{0.25*0.75}{n}}$

$0.03\sqrt{n} = 3\sqrt{0.25*0.75}$

Simplifying by 0.03 both sides

$\sqrt{n} = 100\sqrt{0.25*0.75}$

$(\sqrt{n})^2 = (100\sqrt{0.25*0.75})^2$

$n = 1875$

The sample size is 1875.

7 0

2 years ago

Pls help i really need it

o-na [289]

Answer:

Step-by-step explanation:

Since a <em>fraction</em> is a division problem, you can do every answer and compare them until you get them in order, which D is the most reliable.

8 0

1 year ago

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(20 POINTS)!!!

Alborosie

The answer is letter C

5 0

2 years ago

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