Question: Use Table 12.2 to make tables with the given properties.
A car rental company charges $40 a day and 15 cents a mile for its cars.
(a) Write a formula for the cost, C, of renting a car as a function, f, of the number of days, d, and the number of miles driven, m.
(b) If C = f(d, m), find f(5, 300) and interpret it.