A company deposits $2000 in a bank at the end of every year for 10 years. The company makes no deposits during the subsequent 5 years. If the bank pays 8% interest, how much would be in the account at the end of 15 years?

At the end of the first 10 years, the amount in the account is
$2000*[1+1.08+1.08^2+1.08^3+ ... + 1.08^9]
= $2000 [ (1.08^10 - 1) / (1.08 - 1) ]
= $2000 (1.1589/0.08) = $28973.12

Interest then accrues for the next 5 years, bringing the total to
$28973.12 * [ (1.08)^5 ] = $42571.03

The "cents" in this calculation are unreliable, since the bank may round off to the nearest cent at the end of each compounding period.

General education? that is the only one i could think of.