• If you deposit $15000 in an account that pays 5% interest, how much will you have after at the end of 5 years? 10 years? And 20 years?
• Edward needs $500 now for a project, and will pay you back $570 in a year. Is that a good investment when you can get 10% elsewhere? hint: if accept it, and you must reject it for less than 0)