AP Calculus AB Quiz
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CONTEXTUAL APPLICATIONS OF DIFFERENTIATION
Question 1
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A circle expands with
d
r
d
t
=
4
\frac{dr}{dt}=4
d
t
d
r
=
4
; what is
d
A
d
t
\frac{dA}{dt}
d
t
d
A
when
r
=
2
r=2
r
=
2
, given
A
=
π
r
2
A=\pi r^2
A
=
π
r
2
?
A
8
π
8\pi
8
π
B
16
π
16\pi
16
π
C
32
π
32\pi
32
π
D
4
π
4\pi
4
π
E
64
π
64\pi
64
π
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