Who knows this Warm-Up 27 Shawn invests $4.000 at a rate of 8% (simple interest). What is the amount of interest at the end of the first year? $320 $4320 S5000 $3200​

The volume of a spherical hot air balloon v(r) = 4 3 ? r3 changes as its radius changes. the radius is a function of time given by r(t) = 3t. find the instantaneous rate of change of the volume with respect to t at t = 2.