Hector has 1 /10 of the number of points he needs. This turns out to be just 20 points. How many points does Hector need?pls help me ,<3

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Angle that produces maximum distance

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?