04-08-2016
Mathematics

contestada

r(t)=3t
A(r)=pi r^2
find A[r(t)]

Respuesta :

dalendrk dalendrk

04-08-2016

r(t) = 3t; a(r) = πr²

subtitute:

a[r(t)] = π(3t)² = 9πt²

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