1. You have:
 FV=PV(1+i)(1+j)
 FV is the future value.
 PV is the present value (PV=$750).
 i=10.5%=0.105
 j=7.5%=0.075
 2. Therefore, you only have to substitute these values into the formula FV=PV(1+i)(1+j) to obtain the Future value:
 FV=PV(1+i)(1+j)
 FV=$750(1+0.105)(1+0.075)
 FV=$750(1.105)(1.075)
 3. Then, the result is:
 FV=$890.91
 What would be the second year future value?
 The answer is: $890.91