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2 years ago

7/11 = x/9 Round your answer to the nearest tenth.

Mathematics

1 answer:

Alexeev081 [22]2 years ago

6 0

The solution to the given fraction 7/11 = x/9 to the nearest tenth is 5.7

<h3>Fraction</h3>

7/11 = x/9

cross product

7 × 9 = 11 × x

63 = 11x

divide both sides by 11

x = 63/11

x = 5.72727272727272

Approximately,

x = 5.7

Learn more about fraction:

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3 years ago

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3 years ago

I need to know how to multiply 2/9×5/7

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3 years ago

A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard dev

zimovet [89]

Answer:

$Z = 3.33$

Step-by-step explanation:

Z-score:

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 question:

$\mu = 13, \sigma = 1.2$

You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 17 minutes. Calculate the z-score for this amount of advertising time.

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3 years ago

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3 years ago