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2 years ago

Graph the function.

Mathematics

1 answer:

Anna71 [15]2 years ago

3 0

Step-by-step explanation:

shown in the photo I have provided

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7 is 5% of what number

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the answer is 140 , please let me know if I am wrong.

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2 years ago

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Which of the following describes the graph of y=[x-2]?

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Step-by-step explanation:

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1 year ago

We are studying the proportion of cities that have private garbage collector. We want a maximum error of 0.10 and a 95% confiden

True [87]

Answer:

The minimum number of cities we need to contact is 96.

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 interval $1-\alpha$ , 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:

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

95% confidence interval

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

In this problem, we have that:

$p = 0.5, M = 0.1$

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

$0.1 = 1.96*\sqrt{\frac{0.5*0.5}{n}}$

$0.1\sqrt{n} = 0.98$

$\sqrt{n} = 9.8$

$(\sqrt{n})^{2} = (9.8)^{2}$

$n = 96$

The minimum number of cities we need to contact is 96.

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2 years ago

Help me please its a math question

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Use the app Photomath it literally helps with everything and it explains

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2 years ago

Write the expanded form of the expression. 7(2x + y)

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Answer:

14x+7y

Step-by-step explanation:

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2 years ago