What would be the value of $100 after 10 years if you earn 11 percent interest per year?

If the interest is simple interest, then the value is

       100 [ 1 + (10 x 0.11) ]  =  100 (1 + 1.1)  =  100 x 2.1  =  $210 .

If the interest is compound interest, and is compounded annually,
then the value is

       100 (1 + 0.11)¹⁰  =  100 (2.8394)  =  $283.94 .

If the interest is compound interest, and is compounded monthly,
then the value is

       100 (1 + 0.11/12)¹²⁰  =  100 (2.9891)  =  $298.91 .

That's why compound interest is better than simple interest. 

Ibelieve the answer is c i worked it out three times but if my answer is wrong someone correct me