An Internet bookstore charges 15 shipping for orders under

Last updated: 2/4/2023

An Internet bookstore charges 15 shipping for orders under 100 but provides free shipping for orders of 100 or more The cost C of an order is a function of the total price x of the books purchased given by x 15 C x x if x 100 if x 100 Find C 50 C 90 C 100 and C 105 C 50 C 90 C 100 C 105