[IMG]file:///C:/DOCUME%7E1/AWCOLL%7E1/LOCALS%7E1/Temp/moz-screenshot-2.jpg[/IMG][IMG]file:///C:/DOCUME%7E1/AWCOLL%7E1/LOCALS%7E1/Temp/moz-screenshot-3.jpg[/IMG]Hello, I think I am just doing the integration with respect to x incorrectly, can anyone help me out here?

Evaluate where is the box determined by

, , and .