A rental car agency charges $27.00 per day and 28 cents per mile. (a) Calculate the rental charge if you rent a car for 3 days and drive 300 miles. (Round your answer to the nearest cent.) $ (b) Use a formula to express the cost of renting a car as a function of the number of days you keep it and the number of miles you drive. (Let d be the number of days you rent the car, m the number of miles you drive the car, and C the cost in dollars of renting the car.) C(d, m) = (c) It is about 250 miles from Dallas to Austin. Use functional notation to express the cost to rent a car in Dallas, drive it to Austin, and return it in Dallas 1 week later. Use the formula from part (b) to calculate the cost. (Round your answer to the nearest cent.) C( , ) = $
