You deposit $500 in an account that pays 4% annual interest what is the balance after 10 years if it is compounded semiannually.

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?