Question

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Answer 1

25.1

Explanation:

Formula of Circumference: 2πr
Radius: 4yd
Diamteter: 8yd

π = 3.14
= 2 x π x r
= 2 x 3.14 x 4
= 25.12

Rounded up:
= 25.1

Answer 2

C ≈ 25.1 yd

Explanation:

the circumference (C) of a circle is calculated as

C = 2πr ( r is the radius ) , then

C = 2π × 4 = 8π ≈ 25.1 yd ( to the nearest tenth )