find the amount accumulated in an account after $9000 is invested for 8 years at a 4% coumpounded monthly

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.

With number 11 ( show how you got the answer)

Handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony?