Alaptop has a listed price of 615.98 before tax. if the sales tax rate is 6.25% , find the total cost of the laptop with sales tax included.

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?