For the following exercises, use each pair of functions to nd 3\" (g (1)) and girl-1}) 24. f (x): 4' 2x+5 , g[x]=x2+? Real-World Applications 25. The radius r, in inches, of a spherical balloon is related to the volume, V, by r: 3 E .Air is pumped into the balloon, so the volume after 4 n t seconds is given by V (t) = 15+18 t . Find the composite function FW(I)) and use it to answer the following questions. Round the results to the nearest hundredth of a second. [M036] a. At what exact time is the radius 10 inches? 1}. At what exact time is the radius 20 inches? c. At what exact time is the radius 30 inches