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Vitek1552 [10]
3 years ago
11

Someone Please Help!!!

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
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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