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kaheart [24]
3 years ago
6

75 percent of 225 million

Mathematics
1 answer:
andrew11 [14]3 years ago
3 0
The answer is 168,750,000
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A worn, poorly set-up machine is observed to produce components whose length X follows a normal distribution with mean 14 centim
Akimi4 [234]

Answer:

74.86% probability that a component is at least 12 centimeters long.

Step-by-step explanation:

Problems of normally distributed samples are 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.

In this problem, we have that:

\mu = 14

Variance is 9.

The standard deviation is the square root of the variance.

So

\sigma = \sqrt{9} = 3

Calculate the probability that a component is at least 12 centimeters long.

This is 1 subtracted by the pvalue of Z when X = 12. So

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

Z = \frac{12 - 14}{3}

Z = -0.67

Z = -0.67 has a pvalue of 0.2514.

1-0.2514 = 0.7486

74.86% probability that a component is at least 12 centimeters long.

6 0
3 years ago
A house was bought for $50000 and was sold 15 years later for $95000. find the effective yield.
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Answer:

If we divide that by 15 years, we get an annual yield of

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Step-by-step explanation:

welcome :)

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What is the answer?​
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the answer should be always, which would be b

Step-by-step explanation:

if you have a reciprocal 3/2 then the fraction would be 2/3 which is proper. you just flip the numbers.

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HELP PLEASE!!! I WILL FIVE STAR!!
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