Answer:
The answer is 40π in.
Explanation:
The way you can find circumference using radius is this formula below:
c= 2π*r
c=6.8*20
c=40π in.
I hope this helped. Good luck on the rest of your exam! :)
area=100π
circumference=2πr
20π=2πr
20=2r
r=10
area=πr^2
area=π10^2
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