I am asked to find the change of A with respect to r, when r=4
the problem reads:
A=2700[1+(r/1200)]^96
The available choices are:
A) dA/dr= 297.3
B) dA/dr= 216.72
C) dA/dr= 217.44
D) dA/dr= 296.31
I don't understand how to do this even after substituting 4 for the r

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what do you get for dA/dr ?

Use a order of operation. PEMDAS First to do is the paratheis

you need to find the derivative of A

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