During an electronic store's sale days, the regular price for cd players is discounted $10.there is a state sale tax of 5%, and the $10 discount is applied before the sales tax is calculated.

a) write am expression that shows the regular price r of a cd player minus the $10 discount.

b) write a rule for the function p(r) that expresses the final price p of a cd player with the discount applied and sales tax included.

c) how much would you pay during sale days for a cd player regularly priced at $29.50