You must convert 56 to cm comment on that answer and will help from there
Dr /dt = 7
A = pi r^2
dA / dr = 2pir
dA/dt = dA/dr * dr/dt = 2pir * 7 = 14pir
when r = 12 rate of change of the area = 14*pi*12 = 168pi
= 527.79 cm^2 / minute to nearest hundredth
F−g+(−2)f, minus, g, plus, left parenthesis, minus, 2, right parenthesis where f = -3.005f=−3.005f, equals, minus, 3, point, 005
valentina_108 [34]
Answer:

Step-by-step explanation:
Given


Required
Determine 
We have:

Open brackets

Substitute values for f and g

Solve
Answer:

Step-by-step explanation:
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