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Amanda [17]
3 years ago
11

What is the process to get 90 divided by 40

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
7 0
\frac{90}{40} =  \frac{9*10}{4*10} =  \frac{9}{4} = 2.25
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A pole 5 feet tall is used to support a guy wire for a tower, which runs from the tower to a metal stake in the ground. After pl
sammy [17]

The length of the guy's wire to the nearest foot is 89 feet.

The situation forms a right-angled triangle.

<h3>Properties of a right angle triangle:</h3>
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The hypotenuse of the triangle is the length of the wire.

let's use the smaller triangle to find the angle opposite the tower. Therefore,

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Therefore,

length of wire ≈ 89 feet.

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4 0
2 years ago
Reduce the 24 hour clock times in 12 hour clock time add am or pm
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Answer:

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A recent study at UGA (March 5, 2008) suggests that students with cell phones may take more risks than students that do not have
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Answer:

(a) -2.8

b) (1) Reject H0: p = 0.50 in favor of HA: p < 0.50; there is sufficient evidence to conclude that less than half of all UGA female students who, if they had a cell phone, would be willing to walk somewhere after dark that they would normally not go.

Step-by-step explanation:

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

H0: p = 0.50

This means that:

\mu = 0.5, \sigma = \sqrt{0.5*0.5} = 0.5

In a random sample of 305 UGA female students, 128 responded that, if they had a cell phone, they would be willing to walk somewhere after dark that they would normally not go.

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a) Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.4197 - 0.5}{\frac{0.5}{\sqrt{305}}}

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Pvalue:

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Looking at the z-table, z = -2.8 has a pvalue of 0.0026

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6 0
3 years ago
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