A meteorologist is inflating a spherical balloon with helium gas. If the radius of the balloon is changing at a rate of 1.5cm/s,
express the volume V of the balloon as a function of time t(in seconds).
A. V(t)=4.5πt³
B. V(t)=7.5πt³
C. V(t)=5.5πt³
D. V(t)=6.5πt³
