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ushi ushi
  • 04-08-2016
  • Mathematics
Answered

r(t)=3t

A(r)=pi r^2

find A[r(t)]

Verified Answer :

dalendrk
dalendrk dalendrk
  • 04-08-2016

r(t) = 3t; a(r) = πr²

subtitute:

a[r(t)] = π(3t)² = 9πt²

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