A rental truck costs $72.95 for a day plus 74¢ per mile.
(a) If x is the number of miles driven, write an expression for the total cost C, in dollars, of renting the truck for a day.
C = 72.95 + 0.74x
(b) Find the total cost of the rental if it was driven 144 miles.
C = 72.95 + 0.74(144)