In order to determine the money Jackie will have after 3 years, use the following formula for the Interest compound annually:
I = P(1 + r/100)^t
where P is the invested money, t is the time, r is the interest rate per year and I is the interest.
Then, for this case you have:
P = 325
r = 4.1
n = 100
t = 3
By replacing in the formula for I, you obtain:
I = (325)(1 + 4.1/100)³
I = (325)(1.041)³
I = 366.63
Hence, Jackie will have $366.63 after 3 years
