How are the number of periods (n) and rate of interest for a single period (i) determined for the time value formulas?
n is the # of compounding periods. For 3 years, annual n=3, semi ann n=6 and quarterly n=12
i is the interest rate for a single period. For a 10% rate, if compounded annually, i = 10%, if semiannually, i = 5%