Robert put $15,000 into an account with a fixed interest rate two years ago and now the account balance is $16,917.66. What rate of interest did Robert earn?

You want to have $80,000 in your savings account 11 years from now, and you’re prepared to make equal annual deposits into the account at the end of each year. if the account pays 6.30 percent interest, what amount must you deposit each year? (do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)