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# Related Rate: Volume of a Balloon

APCALC-S1BXUL

The radius of a spherical balloon is decreasing at the rate of $0.3$ inch/s. The rate of change of volume (in inches cubed per second) when radius of the balloon is $4$ inches is, approximately:

$$V=\frac{4}{3}\pi r^3$$

A

$-65$

B

$-66$

C

$-62$

D

$-60$

E

$-56$