Recycled CDs, Incorporated, offers a choice of 5 used CDs for $30, with each additional CD costing 56 Write a cost function for purchasing 5 or more CDs What will the cost of buying 15 CDs bo? Let x represent the number of CDs over 5
C(x)=0
(Type an expression using x as the variable.)
The total cost for 15 CDs is $
(Type an integer or a decimal.)