1) You deposit $500 into a saving account at ABC Bank near your house for 2 years. At the end of 2 years, you withdraw all your money and received a total sum of $600. The interest rate/year earned from this saving account should be?

2) You deposit $5000 in a bank that paid interest of 6% /year, compounded monthly. Then the total sum of money by the end of year 3 is most nearly?

3) You deposit $1000 at the beginning of each year for the next 5 years. However, you do not withdraw your money until the end of year 7. If you earn 10% of interest/year, the total sum of your money at the end of year 7 is most nearly?

4) A Credit card company will charge you 2.5% of interest/month for the unpaid balance. The actual effective rate of interest/year will be most nearly?