If $5,000 is invested in an account at a simple annual rate of r percent, the interest is $250. When $15,000 is invested at the same interest rate, what is the interest from the investment? Choose the correct choice from the following choices:
A) $700
B) $850
C) $800
D) $750
E) $900
-&gt; 250/5,000=5% and 15,000*5%=750.   Thus, $750 is the answer.
<result>D</result>
If $5,000 is invested in an account at a simple annual rate of r percent, the interest is $250. When $15,000 is invested at the same interest rate, what is the interest from the investment?