find the present value of $800 due in the future under each of these conditions: 12% nominal rate, semiannual compounding, discounted back 7 years. do not round intermediate calculations. round your answer to the nearest cent. $ 12% nominal rate, quarterly compounding, discounted back 7 years. do not round intermediate calculations. round your answer to the nearest cent. $ 12% nominal rate, monthly compounding, discounted back 1 year. do not round intermediate calculations. round your answer to the nearest cent. $ why do the differences in the pvs occur?