azulueta2106 azulueta2106

31-03-2022
Mathematics

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The area of a circle is 81π ft². What is the circumference, of feet? Express your answer in terms of π

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Lovelee22 Lovelee22

31-03-2022

Answer:

18π

Step-by-step explanation:

81π = πr²

√81 = √r²

9 = r

C = 2πr

C = (2)(π)(9)

C = 18π

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