Question

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Answer 1

C = 78.54

A = 490.87

Explanation:

1. Circumference Formula

C = 2πr (r=d/2=12.5)

C = 2π12.5

C ≈ 78.54

In terms of pi:

25π

2. Area of circle

A = πr^2

A = π12.5^2

A ≈ 490.87

In terms of pi

156.25π or 625π/4