Due in 4 hours, 60 minutes. Due Tue 09/07/2021 11:59 pm 3V The radius r, in inches, of a spherical balloon is related to the volume, V, by r(V) = 1 4 7 Air is pumped into the balloon, so the volume after t seconds is given by V (t) = 20 + 20t. a. Find the composite function: r(V(t) ) = Preview b. Find the exact time when the radius reaches 9 inches. seconds Preview Get Help: VIDEO Points possible: 1 License This is attempt 1 of 10. Submit