A restaurant's delivery person can determine the number of miles he can drive in x hours by the function f (x) = )4:2 + 3x. The number of gallons of gasoline ihat the delivery person uses for driving y miles can be determined by the function 9\"!) - 21 If the delivery person works an 8-hour shift, how many gallons of gasoline will he need in his tank? 0 4:. N