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katrin2010 [14]
3 years ago
13

A random sample of 50 people from a town with a population of 14,878 were asked to name their favorite flavor of ice cream. If 7

people in the same named chocolate as their favorite ice cream flavor about how many people in the town would be expected to name chocolate
Mathematics
1 answer:
Alik [6]3 years ago
4 0

Answer:

2082.91

Step-by-step explanation:

first: 50÷7=answer

second: 14878÷answer=solution

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Drake buys a ring that costs $8,000, which depreciates at a rate of 9.5% per year.
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$1129.93

Step-by-step explanation:

100 - 9.5 = 90.5

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i hope this helps

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3 years 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
Which number line shows the approximate location of 24?
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Answer:

Step-by-step explanation:

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What method would you use to solve -4x2 - 5x + 5=0
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Using the quadratic formula
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