an investment that will be worth $128 500 in 8 years. The interest rate is 6.5%/a, compounded semi-annually.
+37157 128 500 = pv (1+ .065/2)8*2 solve for pv interest is then 128500 - pv
.065/2 is interest per period in decimal form (twice per year) and there are 8*2 periods in eight years
