Question $10(0\mathrm{.}2$ points$)$

Kevin had $$6,270$ in his savings account at the beginning of this year. This amount includes both the $$6,000$ he originally invested at the beginning of last year plus the $$270$ he earned in interest last year. This year, Kevin earned a total of $$282\mathrm{.}15$ in interest even though the interest rate on the account remained constant. This $$282\mathrm{.}15$ is best described as:

discounted interest.

simple interest.

compound interest.

interest on interest.

complex interest.