The balance after 4 years will be the amount.
Amount = Principal + Interest
Given
principal = 500.00
Rate = 12%
time = 4years
First we need to get the interest;
Interest = PRT/100
Interest = 500*12*4/100
Interest = 5*12*4
Interest = 240.00
Get the balance after 4years
Amount = 500.00 + 240.00
Amount = 740.00
Hence the balance after 4 years is 740.00