Answer:
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Step-by-step explanation:
r=4in 4^2 is 16 then multiply it by 3.14 to get 50.24
r=2in 2^2 is 4 then multiply it by 3.14 to get 12.56
d=2in Since you have the diameter first, you just divide it by 2 and your radius is 1. 1^2 is 1 1*3.14=3.14
r=8in 8^2 is 64 then multiply it by 3.14 to get 200.96
d=12in divided 12 by 2 and you get 6. 6^2 is 36, multiply that by 3.14 to get 113.04
