Aman is four times as old as his son. in 3 years time, the father will be three times as old as the son. how old is each now?

Is it greater than or less than7*3_9*2

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?