Answer:
$2,320
Step-by-step explanation:
the interest accrued by February 28, 20X5 = $10,000 x 12% = $1,200
since the interest compounds yearly, the interest accrued by December 31, 20X5 = ($11,200 x 12% x 10/12) + $1,200 = $1,120 + $1,200 = $2,320
Compound interest means that earned interest will earn more interest itself in the next period. That is why you need to include the previously accrued interest in the interest calculation for the second part.