1) You invested $6,000. In six years you get back $15,000. What is the interest rate with (a) annual (b) monthly compounding?
2) You made a deposit of $10 in the beginning of year 1 and $20 at the beginning of year 2. The nominal rates of interest during years 1 and 2 were 10 percent and 20 percent, respectively. How much money will you have in your account at the end of the second year assuming continuous compounding?