1. In honor of the day Emil was born, his cool grandmother deposited $400 in a saving account that paid 5% annually. She didn't tell Emil about the money until his 20th birthday. How much money did Emil find waiting for him in the account?

2. on January 1, 2012, you deposited $7500 in a CD at a local bank that will earn `10% each year. The CD matures on January 1, 2020, how much money will you receive?

3. Your local bank has a saving account that pays interest of 10% semi-annually. You place a single amount of $3500 in the account for nine years. What will the money grow to become?