Can you help with the formulas for the following; What is the present value of $15,000 received

a. 10 years from today when the interest rate is 8 % per year?

b. 20 years from today when the interest rate is 16 % per year?

c. 5 years from today when the interest rate is 4 % per year?

Please help with the following the formulas for:

a. What is the present value of $15,000 received 10 years from today when the interest rate is 8% per year?

The present value is $ _____ (Round to the nearest dollar).

b. b. What is the present value of $15,000 received 20 years from today when the interest rate is 16 % per year?

The present value is $ ______ . (Round to the nearest dollar.)

c. What is the present value of $ 15,000 received 5 years from today when the interest rate is 4 % per year?

The present value is $ _________ . (Round to the nearest dollar.)