On the day she retired, Kate had $101,900 in retirement savings. She expects to earn 4.5 percent, compounded monthly, and live 24 more years. How much can she withdraw from her savings each month during her retirement if she plans to die on the day she spends her last
penny?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?