# [SOLVED] SI manipulation

• Apr 15th 2009, 09:47 PM
manyarrows
[SOLVED] SI manipulation
I am doing the following three problems and seem to get multiply answers depending on how I do it. What is the proper tech.

Evaluate each of the following and express with the the appropriate prefix

1) $(430 kg)^2$
2) $(0.002 mg)^2$
3) $(230 m)^3$

Take the first one for instance. Why can't I square 430 and kg.

$184900 kg^2 = 185.0 Mg^2$

Yet the text says the answer is $0.185 Mg^2$

I have simiar difficulties with the others. What am I not seeing?
• Apr 15th 2009, 10:23 PM
manyarrows
nevermind
Never mind I wasn't squaring my new prefix.