1. In how many years will $8800 grow to $30540 at 8% compounded monthly?

2. Suppose $6500 earns an interest of $650.17 in one year. What is the nominal annual rate of interest compounded semi-annually?

3. Solve for w: K = (5k+3w)/(7r-5w)

4. At what nominal annual rate of interest will money double itself in 7 years and 5 months if compounded monthly?

5. A deposit of $2000 earns interest at 6% p.a. compounded monthly for four years. At that time, the interest rate changes to 7% p.a. compounded quarterly. What is the value of the deposit three years after the change in the rate of the interest?