What is the greatest positive integer T such that 3^T is a factor of 9^10? Choices
A) 5	B) T=9	C) T=10	D) T=20	E) 30
What is the greatest positive integer T such that 3^T is a factor of 9^10?   9^10 = (3^2)^10 = 3^20   D. 20
<result>D</result>
What is the greatest positive integer T such that 3^T is a factor of 9^10?