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nekit [7.7K]
3 years ago
10

Square root of 90 to the nearest integer

Mathematics
2 answers:
Cloud [144]3 years ago
7 0

Answer:

9

Step-by-step explanation:

\sqrt{90} \\As\ 90\ is\ closer\ to\ 81\ more\ than\ 100,\ its\ square\ root\ is\ closer\ to\ 9\ than\ 10.\\Hence,\\9\\

Or you can directly perform long division to obtain 9.487 as the result. 9.487 is closer to 9 than 10. Hence, 9

sergiy2304 [10]3 years ago
6 0

Answer:

9

Step-by-step explanation:

since 9.48683298051 is the square root of 90 and has a 4 in the tenths number and since 4 isnt bigger than 5 i would say it rounds to 9

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Answer:

Explained below.

Step-by-step explanation:

(1)

The hypothesis can be defined as follows:

<em>H</em>₀: The Speedy Oil Change will change the oil in​ customers’ cars in more than 30 minutes on average, i.e. <em>μ</em> > 30.

<em>H</em>ₐ: The Speedy Oil Change will change the oil in​ customers’ cars in less than 30 minutes on average, i.e. <em>μ</em> ≤ 30.

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Use Excel to compute the sample mean and standard deviation as follows:

\bar x=\text{AVERAGE(array)}=24.917\\\\s=\text{STDEV.S(array)}=8.683

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   = 36 - 1

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p-value=P(t_{35}

(3)

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The null hypothesis will be rejected at any of the commonly used significance level.

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There is sufficient evidence to support the claim that the Speedy Oil Change will change the oil in​ customers’ cars in less than 30 minutes on average.

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