Do You Need A Financial Calculator For The Cfas Financial Calculator - Annuity Problem?

Financial calculator - Annuity problem? - do you need a financial calculator for the cfas

What must I do to fix the number of periods in an annuity with a financial computer? (The button)

More information about the problem: Guy wants up to $ 500,000 from the investment of U.S. $ 8,000 per year on the stock market to withdraw (from the end of this year). 15% average annual return. How long before retirement, to save money?

I:

FV = 500,000
Interest rate = 15
Payment = 8000
0 N (15%, PMT 8000, PV 0)
... he keeps leaving 0 .. Relevance of the formula (because the PV is 0). Now I know the answer is 17 years guess, but I need to know how to do it on a computer.

Any help is welcome. Thank you.