At a sale, shirts were sold for 15 each . this price was 80%of thier original price . what was the origial price

Astudent simplified a rational expression as shown.

Answer for 10 points show work you guys in advanced < 3

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.