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erma4kov [3.2K]
3 years ago
9

Converting mixed numbers to impoper fractions

Mathematics
2 answers:
Oduvanchick [21]3 years ago
5 0
To convert a mixed number to an improper, first, multiply the denominator of the fraction and the whole number of the fraction. Then, add the numerator to the product of the denominator and the whole number.
For example, 3 1/4. Multiply the 3 and 4 to get 12. Then add the one and you get 13. Lastly, take your sum (13 in this case) and put it over the original denominator (4) Your answer is 13/4. Hope that helps :)
Anna007 [38]3 years ago
4 0
Ok so say u have 3 2/4. 3 is ur whole number, 2 is ur numerator, and 4 is ur denominator. First:
2
3 —
4
U multiply 3 and 4 and get 12, now keep 12 in ur head, there is no need to write it down, unless u want too...now u add 12+2 (2 is the numerator) which is 14. So ur whole number and numerator are now gone but ur denominator stays, it’s still 4, and now that ur old numerator is gone u replace it with 14 so u get 14/4. And there is ur improper fraction
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In 2014, the CDC estimated that the mean height for adult women in the U.S. was 64 inches with a standard deviation of 4 inches.
Vladimir79 [104]

Answer:

A. 16%

Step-by-step explanation:

Problems of normally distributed samples 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.

In this problem, we have that:

\mu = 64, \sigma = 4

Which of the following gives the probability that a randomly selected woman has a height of greater than 68 inches?

This is 1 subtracted by the pvalue of Z when X = 68. So

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

Z = \frac{68 - 64}{4}

Z = 1

Z = 1 has a pvalue of 0.84.

1 - 0.84 = 0.16

So the correct answer is:

A. 16%

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3 years ago
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Answer:

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Step-by-step explanation:

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Snezhnost [94]

Answer:

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Mrs. Chen needs 180 feet of fence.

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