(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img39.imageshack.us/img39/8019/92452636.jpg [Broken]

2. Relevant equations

3. The attempt at a solution

i got -234 for the last part but it should be abs.value so 234.. but it didnt work.

is my work correct?

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# Homework Help: Net Change Theorem help

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