What interest rate enables an imvestor to obtain a 70% increase in an investment in 2 years if the interest is compounded quarterly? (Round your answer to the nearest percent.)

Tom, a graduate student, is considering investing $500 now, when he is 23, or waiting until he is 40 to invest $500. How much more money will he have at age 65 if he invests now, given that he can earn 5% interest compounded quarterly? Show formula and written work

Is the value of b were to change to a larger number, what else would change as a result of this?

What annual interest rate would allow Karen to double her investment if it is compounded quarterly for 6 years? round to 2 decimal places.

Find the interest rate needed for an investment of $3,000 to triple in 11 years if interest is compounded monthly. (Round your answer to the nearest hundredth of a percentage point.)