Step-by-step explanation: Interest formula - I = P × R × T I = 3,280 × 0.3% × 9 What I basically did there wws multiply the amount of money, the simple interest, and the time. Turn 0.3% into a decimal by dividing by a 100 which should give you 0.003
I = 3,280 × 0.003 × 9
Put that into a calculator, you get $88.56
Now, that's just the interest amount. Now you add it back to 3,280 to get the *total* amount.