2 years ago

Which functions are correctly graphed? Select all the correct answers

Mathematics

1 answer:

garri49 [273]2 years ago

4 0

the second one, and the third one

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As a manager for an advertising company, you must plan a campaign designed to increase Twitter usage. A recent survey suggests t

kolbaska11 [484]

Given:
Sample proportion = 85% = 0.85.
Confidence level (CL) = 90%.
Confidence interval (CI) $\hat{p} \pm z^{*} \sqrt{ \frac{\hat{p}(1-\hat{p})}{n} } \\ where \\ n=sample\, size \\ z^{*}=1.645 \, at \, 90\% \, CL$

We want the confidence interval to be 5% or 0.05. Therefore
$0.85 - 1.645 \sqrt{ \frac{0.85(1-0.85)}{n} }=0.05 \\ 0.85 - \frac{0.5874}{ \sqrt{n} } =0.05 \\ \frac{0.5874}{ \sqrt{n} }=0.8 \\ \sqrt{n} = .7342 \\ n=0.54$

Because this number is less than 1, a default sample size of 30 (for the normal distribution) is recommended.

Answer: 30

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3 years ago

A fish tank is in the shape of a cube. Its volume is 125ft3. What is tge area of one face of the tank?

kenny6666 [7]

Answer:

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2 years ago

How to simplify questions

forsale [732]

To simplify questions, you answer them.

8 0

2 years ago

. Write an equation that is perpendicular to y=2x – 1 and has y-intercept of -3

blagie [28]

The answer is very simple .

First you need to determine the slope, which is the reciprocal of the first line.

Then,

y = mx + b

m => -1/m

The perperdicular line has a new slope equal to m = -1/2

In the formula (y - y1) = m ( x - x1 ) + b , you should sustitude this value.

So the final equation will be

-3 = -1/2 (0) + b

b = - 3

y = (-1/2)x - 3

That is the solution

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9 months ago

School chorus has 90 sixth-grade students and 75 seventh-grade students. The music director wants to make groups of performers,

inn [45]

Answer:

90 + 75 = 165

165 divided by 3 = 55

4 0

2 years ago