The formula for compound interest is: A = P(1 +r/n)^nt
Where P is the principal ( starting value)
r is the interest rate
n is the number of compounds
and t is the number of years.
Fill in the letters with the given information:
A = 400(1+0.04/12)^(12*11)
A = 400(1.00333)^132
A = 400*1.551557
A = 620.63
The answer is $620.63
