the fee for the parking garage at the airport is $16 for the first day plus $4.50 for each additional day. which equation represents the fee, f, for leaving your car at the airport for d days, where d is the number of days beyond the first day? a. f = 4.5d 16 b. d = 16f 4.5 c. f = 16d 4.5 d. d = 4.5d 16