- #1

- 58

- 0

## Homework Statement

Link to problem: http://img147.imageshack.us/my.php?image=soundqj3.png

## Homework Equations

No idea, One of the reasons I'm asking. >.>

## The Attempt at a Solution

Ok, I have no idea how to even begin this problem. I need a hint in the right direction, or just what the formula I need here. Thanks in advance.