Aferry charges $30 per car plus $5 for each passenger in the car. what is an explicit function rule for the amount it costs a car with n passengers to ride on this ferry?

Adan has decided to purchase an $9000 car. he plans on putting 20% down toward the purchase and financing the rest at 7.9% interest rate for 3 years. find his monthly payment a) $225.29 b) $298.81 c) $204.78 d) $236.89