Question 1201016
the formula if f = p * (1 + r) ^ n
f is the future value
p is the present value
r is the interest rate per time period.
n is the number of time periods.


you have p = 1100 and r = .08 and n = 15.
the formula becomes f = 1100 * 1.08 ^ 15 = 3489.386026.
that's the total amount.
the total interest is that minus 1100 = 2389.386026.