When Bart bought his car, it averaged 28 miles per gallon of gas. Now, the car’s average miles per gallon has decreased by 14%. What is the car’s average miles per gallon now? Round your answer to the nearest mile per gallon.

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?