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postnew [5]
3 years ago
15

I need help with these questions

Mathematics
1 answer:
AveGali [126]3 years ago
4 0

Answer:

1)10 months 2) 40 cm 3)8in

Step-by-step explanation:

1)1year =12 months

5/6year=?months

cross multiply

5x2=10

------

6x2=12

answer 12months

2)100cm in a meter

100divided by 5=20

1/5=20cm

2/5=40cm

answer:40 cm

3)12in in a foot

12divided by 3=4

1/3=4in

2/3=8 in

answer=8 in

thats all the time I have for now bye

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Answer:

We need a sample size of 564.

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.

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Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

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0.04 = 1.96\sqrt{\frac{0.6231*0.3769}{n}}

0.04\sqrt{n} = 1.96\sqrt{0.6231*0.3769}

\sqrt{n} = \frac{1.96\sqrt{0.6231*0.3769}}{0.04}

(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.6231*0.3769}}{0.04})^{2}

n = 563.8

Rounding up

We need a sample size of 564.

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3 years ago
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