You can put this solution on YOUR website! The answer is C because 450 factor out to 2 x 3 x 3 x 5 x 5 = 450. Therefore the prime factors in 450 are 2, 3 , and 5. Hope this helps!
You can put this solution on YOUR website! 450 =
45*10 =
(9*5)*(5*2) =
(3*3*5)*(5*2) =
3*3*5*5*2 =
(3^2)*(5^2)*2
The prime factors then are 3, 5 and 2.