Hi Autumn M.
$548
Simple Interest is
I=PRT
P = Principal your initial deposit
R = Interest Rate
T = Time in years
Your balance would be your initial deposit plus the interest earned after the three years
P = 500
R = 0.032
T = 3 years
Calculate the interest
I = 500*0.032*3 = 48
Add the interest to the initial deposit for the balance
500 + 48 = $548
I hope this helps.