Bramble Corp. uses a 40% material loading charge and a labor rate of $25 per hour. How much will be charged on a job that requires 3.5 hours of work and $20 of materials?

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?