Swan Auto Rental charges $32 per day plus $0.18 per mile for an automobile rental (a) Elaine rented a car for one day and she drove 83 miles. How much did she pay? (b) Ramon paid $69.80 to rent a car for one day. How far did he drive​

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax