If you deposit $13,000 at 4.85% simple interest, what would your ending balance be after five years

Ineed with math stuff it involves graphs

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0