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siniylev
3 months ago
12

The percent decrease from 12 to 9 is equal to the percent decrease from 40 to what number

Mathematics
1 answer:
Leona [12.6K]3 months ago
8 0
(12 - 9) / 12 = (40 - x) / 40
3/12 = (40 - x) / 40
40(1/4) = 40 - x
10 = 40 - x
10 - 40 = -x
-30 = -x
30 = x <=== percentage decrease from 40 to 30
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The area of a round table in Kim’s living room is 201 square inches. What is the circumference of the round table, to the neares
zzz [12365]

Response:

C. 50.24 inches

Detailed explanation:

The area of a circle can be expressed with \pi r^{2}. To determine the circumference, knowing the radius is essential; thereafter, we can substitute that value into the circumference formula 2\pi r. Hence, to ascertain the radius, we observe that:

\pi r^{2} = 201

r = \sqrt{\frac{201}{\pi } }

As a result, the circumference is:

2\pi (\sqrt{\frac{201}{\pi } }), which approximates the choice C) 50.24 inches.

Hope this was beneficial!:)

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2 months ago
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2 months ago
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From the question, we know that

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