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o-na [289]
4 years ago
5

A railway tunnel 147m long is to be bored with a circular cross section of radius 5m.what volume of soil has to be excavated?

Mathematics
1 answer:
skad [1K]4 years ago
8 0
We have to find the volume of the cylinder, where: r = 5 m and h = 147 m.
V = r² h π
V = 5² · 147 · 3.14 = 25 · 147 · 3.14 = 11,539.5 m³
Answer:
11,539.5 m³ of soil has to be excavated.
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Answer:

The statistical conclusion is:

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Step-by-step explanation:

From this experiment,

The null hypothesis is established as:

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The alternate hypothesis is established as:

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In statistics, if the absolute value of the test statistic is greater than the critical value, we declare statistical significance and reject the null hypothesis.

Since the test statistic = 16.5, which is higher than the critical value of 7.82, this establishes statistical significance.  Thus, the null hypothesis is rejected.

Therefore, the statistical conclusion is that one's willingness to wear masks is not independent of one's age.

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Answer:

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Answer:

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Step-by-step explanation:

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