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