What is the greatest positive integer x such that 2^x is a factor of 8^10?	Choose the correct choice
A) 5 B) 9 C) 10 D) 20 E) 30
8^10 = (2^3)^10 = 2^30   ANSW30R:30
<result>E</result>
What is the greatest positive integer x such that 2^x is a factor of 8^10?