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bezimeni [28]
3 years ago
13

Mr. Johns. is building a 5-sided fence. The Planks he is using are 5 In wide. The fence is 30 feet long on each side

Mathematics
2 answers:
Crazy boy [7]3 years ago
8 0

Answer:

Step-by-step explanation:

30 feet * 12 inches / foot = 360 inches

360 inches can be covered by 360 / 5 = 72 planks

Each of the five sides requires 72 planks

72 * 5 = 360 planks

ANTONII [103]3 years ago
6 0
Answer is a have a good day
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b) The standard deviation is \sigma = 9

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Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

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The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

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55.5 + 0.5\sigma = 71.52 - 1.28\sigma

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\sigma = \frac{(71.52 - 55.5)}{1.78}

\sigma = 9

\mu = 55.5 + 0.5\sigma = 55.5 + 0.5*9 = 55.5 + 4.5 = 60

Question

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