Benita buys 2 shirts for the same price, s. The sales tax rate is 6.5%. Write an expression to represent the total cost of the shirts in two different ways.

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?