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VashaNatasha [74]
3 years ago
5

Find the missing measure in a right triangle if a= 9 ft and b = 12 ft.

Mathematics
1 answer:
Lena [83]3 years ago
5 0

Answer:

c = 15 ft

Step-by-step explanation:

a^2 + b^2 = c^2

9^2 + 12^2 = c^2

c^2 = 225

c = √225

<u>c = 15 ft</u>

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Twenty (20) is what percent of 10% of 4,000?
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2 years ago
Read 2 more answers
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim
Alenkasestr [34]

Answer:

n  = 400

Step-by-step explanation:

The formula for the error in our estimate is given by:

Standard Error :  √ ( p(1-p)/ n)

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and we know our error is 3.5 %

But we do not the sample proportion p. Then what we can do is give an estimate of p in the absence of any other information.

In this case we will use p= 0.5 which is the value that maximizes the expression for the standard error :

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  p = 0.5 then SE = 0.050

Substituting

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n = 20²

n = 400

3 0
2 years ago
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