I am horrible in math. help a girl out . 20 points for giving me answers

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

Chanelle deposits $7,500 into the bank. she does not withdraw or deposit money for 6 years. she earns 6% interest during that time. what will the balance be when she is finally able to withdraw her money?

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0