Precalculus
posted by Michael .
I'm a little uneasy about this one, so I thought I'd ask someone who knows 
[QUOTE]
(5z^3w/6m^3)*(6m^5/25z^9)
(OR)
5z^3 6m^5
 * 
6m^3 25z^9
Perform the Operations and Simplify[/QUOTE]
It's a Multiple Choice.
a)wm^2/5z^5
b)wm^2/5z^6
c)z^3wm^5/5z^9m^3
d)none of the above
I chose (D) because the way I did my math I came up m having a power of 8. I feel like I'm wrong here.
My solution: (1/5)m^8wz^12

You forgot the w in your "OR" version. Your answer is wrong in any case. The ratio of the powers of m results in m^2.
The correct answer is (b)