How to get the finance question answer? Thank You!

Michelle Walker wants to accumulate $13,500 by the end of 12 years. If the annual interest rate is 8.00 percent and interest compounds semiannually, how much will she have to invest today to achieve her goal? (If you solve this problem with algebra round intermediate calculations to 6 decimal places, in all cases round your final answer to the nearest penny.) Present value of investment $You invest $280 in a mutual Fund today that pays 5.?0 percent interest annually. How long will it take to double your money? (Ifyou solve this problem with algebra round intermediate calculations to 6 decimal places, in all cases round your final answer to 0 decimal place, e.g. 545} Number of years