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**s3a** I'm referring to #9 of the "mywork.pdf" file. I get the correct magnitude of the final answer but I get the wrong sign (a negative). I know that volume cannot be a negative value so I was hoping someone could tell me why I am wrong. If I just ruined the order of things, simply notyfing me of that would be ok since I think I'm able to solve the algebra by myself...unless my issue is an algebra mistake in which case I'd need my mistake explained.

Any help would be greatly appreciated!

Thanks in advance!