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Arisa [49]
3 years ago
12

How long does it take sound with an average speed of 330 m/s to travel 2475 meters?

Mathematics
1 answer:
blagie [28]3 years ago
6 0

T = (9,000 m) / (1,500 m/s)  

T = 6 seconds

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Answer:

Ratio = \frac{R^2 - r^2 }{ r^2}

Step-by-step explanation:

Given

See attachment for circles

Required

Ratio of the outer sector to inner sector

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Area = \frac{\theta}{360}\pi r^2

For the inner circle

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The sector of the inner circle has the following area

A_1 = \frac{\theta}{360}\pi r^2

For the whole circle

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The sector of the outer sector has the following area

A_2 = \frac{\theta}{360}\pi (R^2 - r^2)

So, the ratio of the outer sector to the inner sector is:

Ratio = A_2 : A_1

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Cancel out common factor

Ratio = R^2 - r^2 : r^2

Express as fraction

Ratio = \frac{R^2 - r^2 }{ r^2}

6 0
3 years ago
Rafael writes an expression to represent “a number, n, decreased by thirty-one.” Then he evaluates that expression if n=29. Whic
yulyashka [42]
This is a subtraction expression.o evaluate, substitute 29 for the variable in the expression.to<span>evaluate the expression, subtract 31 from 29.</span>
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3 years ago
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Given the original number n. Multiply the number by 9. Add 99. Divide this sum by 9. Subtract the original number, n, from the q
tangare [24]

Answer:

11

Step-by-step explanation:

Hello,

Given the original number n.

\large \boxed{n}

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Divide this sum by 9.

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Thank you.

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Answer:

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Step-by-step explanation:

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3 years ago
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4,12,20, 28 nth term
Anna007 [38]

Answer:

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