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Dovator [93]
3 years ago
11

What is the answer to this? ASAP

Mathematics
2 answers:
skelet666 [1.2K]3 years ago
8 0

Answer:

7

Step-by-step explanation:

7^2 = 49

So the square root of 49 is 7

Solnce55 [7]3 years ago
8 0

Answer:

x = ± 7

Step-by-step explanation:

\sqrt{49}  = ± 7 ( plus or minus 7 )

since 7² = 49 and (- 7)² = 49

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Step-by-step explanation:

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3 years ago
Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of 61 miles/hour. The hig
cricket20 [7]

Answer:

The standard deviation of the speeds of cars travelling on California freeway is 6.0088 miles per hour.

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}

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 This p-value is the probability that the value of the measure is greater than X.

In this problem, we have that:

Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of 61 miles/hour. This means that \mu = 61.

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The standard deviation of the speeds of cars travelling on California freeway is 6.0088 miles per hour.

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c hopefully this helps you

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