3 years ago

Someone Please Help!!!

1 answer:

8 0

Basically, r=2t
A(r)=pir^2
sub 2t for r
A(2t)=pi(2t)^2
A(2t)=4pit²

A. A=4pit²

B. t=5
A=4pi5²
A=4pi25
A=100pi
A=314 square units

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