Principal = 31250
Time= 2 and 1/2 years
Rate= 8% so first we take out the amount for 2 years which would be: 36450
Now we we will take out the amount for 1/2 years. Now the rate for 1/2 years is 4% with principal
The amount for 1/2 years for 4% rate is= 37908
Answer: 37908 is the amount after 2 and 1/2 years at the rate of 8%