Find the accumulated value of an investment of 12,000 at 8 % compounded semiannually for 11 years

The "compound amount" formula is A = P (1+r/n) ^ (nt),

where P=original investment, r=interest rate as a decimal fraction; n=number of compounding periods, and t=number of years.

Then A = $12000 * (1+0.08/2) ^ (2*11)

= $12000 (1.04) ^ (22) = $28,439.03 (answer)