can someone help me with these problems

Your aunt offers you a choice of $21,000 in 25 years or $640 today. At a discount rate of 15 percent, how much is your aunt's offer of $21,000 worth today? (Enter your answer as a positive number rounded to 2 decimal places.) 6-2. Which offer should you choose? O $21.000 in 25 years O $640 today Saved If you invest $12,250 today, how much will you have in each of the following cases? Enter all answers as positive amounts. a. In 8 years at 6 percent? (Round your final answer to 2 decimal places.) b. In 16 years at 7 percent? (Round your final answer to 2 decimal places.) c. In 15 years at 14 percent (compounded semiannually)? (Round your final answer to 2 decimal places.) X VC 202030 Prin of Managerial Accou X Connect X + ducation.com/ext/map/index.html?_con=con&external browser=0&launchUrl=https%253A%252F%252Flms.mheducation.com% ork 6 Saved How much would you have to invest today to receive the following? (Enter all answers as positive numbers.) a. $16,000 in 6 years at 10 percent. (Round your answer to 2 decimal places.) b. $20,500 in 18 years at 7 percent. (Round your answer to 2 decimal places.) c. $8,500 each year for 17 years at 8 percent. (Round your answer to 2 decimal places.) You have just been notified that you will receive $8,600 a year for the next 16 years from an inherited trust. If the interest rate is 14 percent, how much should you be willing to accept today in exchange for the annual payments? (Enter your answer as a positive number rounded to 2 decimal places.)