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Vlad1618 [11]
3 years ago
7

If i drive 439.92 miles on 15.6 gallons of gas, how many miles could i drive on 39.7 gallons of gas?

Mathematics
1 answer:
eduard3 years ago
7 0
Make it into a ratio: 439.92/15.6=x/39.7 where x is the unknown. cross multiply to get your answer of 1119.5 miles
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Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

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Part b

The confidence interval for the mean is given by the following formula:  

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}

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