the answer is 200
step-by-step explanation:
the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.
the simple interest for 2 years is $264; the simple interest for 1 year is $132.
$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.
the value of $200 at 22% interest compounded annually for three years is
200%281.22%29%5e3
the amount of interest is that value, minus the original $200.