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Korolek [52]
3 years ago
5

The formula c = 5p + 220 relates c, the total cost in dollars of hosting a birthday party at a skating rink, to p, the number of

people attending. If Allie's parents are willing to spend $345 for a party, how many people can attend? The number of people that can attend the party is​
Mathematics
1 answer:
denis23 [38]3 years ago
5 0

Answer:

25 people

Step-by-step explanation:

c = 5p + 220

345 = 5p + 220

-220          -220

125 = 5p

/5       /5

25 = p

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A sample of 997 is needed.

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How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

This is n for which M = 0.02. So

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0.02 = 2.327\sqrt{\frac{0.08*0.92}{n}}

0.02\sqrt{n} = 2.327\sqrt{0.08*0.92}

\sqrt{n} = \frac{2.327\sqrt{0.08*0.92}}{0.02}

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n = 996.3

Rounding up:

A sample of 997 is needed.

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