3^15 + 3^15 + 3^15 =	Select the correct option
A) 3^20 B) 9^12 C) 3^18 D) 9^15 E) 3^16
Since we have 3^15 added together 3 times, we can factor out a 3 and we get 3(3^15) which is equal to 3^16.   The answer is 3^16.
<result>E</result>
3^15 + 3^15 + 3^15 =