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Yanka [14]
3 years ago
12

Circumference (rounding)

Mathematics
2 answers:
koban [17]3 years ago
5 0

Answer:

radius r = 3.1 in

diameter d = 6.2 in

circumference C = 19.4778745 in

area A = 30.1907054 in2

LUCKY_DIMON [66]3 years ago
4 0

Answer:

19.5

Step-by-step explanation:

Circumference is radius multiplied by 2, then multiplied by pi.

3.1 × 2= 6.2

6.2 × π= 19.477 ≈ 19.5

π also equals 3.14

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Solve for x:

(x - 9) (x + 7) = 25

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x^2 - 2 x - 63 = 25

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Add 1 to both sides:

x^2 - 2 x + 1 = 89

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(x - 1)^2 = 89

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x - 1 = sqrt(89) or x - 1 = -sqrt(89)

Add 1 to both sides:

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Add 1 to both sides:

Answer: x = 1 + sqrt(89) or x = 1 - sqrt(89)

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<u>Explanation:</u>

<u />

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