please provide me explaination .

Using the appropriate interest table, answer the following questions. (Each case is independent of the others.) Your answer is correct. Click here to view factor tables What is the future value of 20 periodic payments of $4,000 each made at the beginning of each period and compounded at 8%? (Round factor values to 5 decimal places, e.g. 1.25124 and final answer to 0 decimal places, e.g. 458,581.) The future value $1197,691.60 Your answer is correct. Click here to view factor tables What is the present value of $2,500 to be received at the beginning of each of 30 periods, discounted at 5% compound interest? (Round factor values to 5 decimal places, e.g. 1.25124 and final answer to 0 decimal places, e.g. 458,581.) The present value 540353 Your answer is correct. Click here to view factor tables What is the future value of 15 deposits of $2,000 each made at the beginning of each period and compounded at 10%? (Future value as of the end of the 15th period.) (Round factor values to 5 decimal places, e.g. 1.25124 and final answer to o decimal places, e.g. 458,581.) The future value 369,899 Your answer is correct. Click here to view factor tables What is the present value of 6 receipts of $1,000 each received at the beginning of each period, discounted at 9% compounded interest? (Round factor values to 5 decimal places, e.g. 1.25124 and final answer to o decimal places, e.g. 458,581.) The present value 54890 Question Attempts: 1 of 3 used