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Anna [14]
2 years ago
11

In a pile of coins there are 7 more quarters than nickels.If there is a total of 2.65 in coins how many quarters are there?

Mathematics
1 answer:
brilliants [131]2 years ago
7 0
25 x 10 = 2.50 》》10 Quarters
+
5 x 3 = 0.15 》》3 Nickles
=
2. 65
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Answer:

The Answer is: 64 oz.

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Convert 2 hours to minutes and then by 15 minutes:

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(1) (4.82, 4.98)

(2) Large sample size

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(2) Error margin = (t-value × standard deviation)/√sample size

From the formula above, error margin varies inversely as the square root of the sample size. Since the relationship between the error margin and sample size is inverse, increase in one (sample size) will conversely lead to a decrease in the other (error margin)

(3) mean = 37.5, sd = 0.6, n= 100, degree of freedom = n-1 = 100-1 = 99

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CI = 15.10 - (2.2006×0.08)/√104 = 15.10 - 0.017 = 15.083

CI is (15.083, 15.117)

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