What is the present value of a security that will pay $5,000 in 20 years if securities of equal risk pay 7% annually?

Assuming that we are looking to calculate the amount of money to be invested now to achieve the stated outcome in 20 years:

At = A0 * (1+r/100m)^mt

For your question, At= 5000, A0=?? r = 7%, m = 1 (this is the number of times interest is paid per annum) and t = 20.

Replace those values in to the equation above and you should get the answer, good luck!