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arsen [322]
3 years ago
9

Write the number 78 as a product of its prime factors

Mathematics
2 answers:
Gre4nikov [31]3 years ago
6 0
2/3 = .66666....
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...

Otrada [13]3 years ago
5 0
78|2\\ 39|3 \\ 13|13 \\ 1 \\ \\ 78=2*3*13
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According to survey​ data, the distribution of arm spans for males is approximately Normal with a mean of 71.4 inches and a stan
Gekata [30.6K]

Answer:

a) 89.97% of men have arm spans between 66 and 76 ​inches.

b) The z-score for this​ person's arm span is 5.68. 0% of males have an arm span at least as long as this​ person

Step-by-step explanation:

Normal Probability Distribution:

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

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

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.

Mean of 71.4 inches and a standard deviation of 3.1 inches.

This means that \mu = 71.4, \sigma = 3.1

a. What percentage of men have arm spans between 66 and 76 ​inches?

The proportion is the pvalue of Z when X = 76 subtracted by the pvalue of Z  when X = 66. The percentage is the proportion multiplied by 100.

X = 76

Z = \frac{X - \mu}{\sigma}

Z = \frac{76 - 71.4}{3.1}

Z = 1.48

Z = 1.48 has a pvalue of 0.9306

X = 66

Z = \frac{X - \mu}{\sigma}

Z = \frac{66 - 71.4}{3.1}

Z = -1.74

Z = -1.74 has a pvalue of 0.0409

0.9306 - 0.0409 = 0.8997

0.8997*100% = 89.97%

89.97% of men have arm spans between 66 and 76 ​inches.

b. A particular professional basketball player has an arm span of almost 89 inches. Find the​ z-score for this​ person's arm span. What percentage of males have an arm span at least as long as this​ person?

Z = \frac{X - \mu}{\sigma}

Z = \frac{89 - 71.4}{3.1}

Z = 5.68

The z-score for this​ person's arm span is 5.68.

Z = 5.68 has a pvalue of 1

1 - 1 = 0

0% of males have an arm span at least as long as this​ person

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Which container has the greatest surface area? (Use 3.14 for π .)
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Answer:

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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8 - y + 2y = 14

y + 8 = 14

y = 14 - 8

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x + y = 8

x + 6 = 8

x = 8 - 6

x = 2

solution : x = 2 and y = 6.....or (2,6)

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