The value is 1 dollar.
With compound interest rate of 9% over 4 period.
=> 1 dollar .09 = 0.0081
=> 1.0081 0.09= 0.090729
=> 0.090729 + 1.0081 = 1.098829
=> 1.098829 .09 = 0.09889461
=> 1.098829 + 0.09889461 = 1.19772361
=> 1.19772361 * .09 = 0.1077951249
=> 1.19772361 + 0.1077951249 = 1.3055187349
Or 1.31