Find the volume of the solid that results when the region above the x-axis and below the curve (a>0,b>0) is revolved about the x-axis.

Not really sure about where to start here, any help would be appreciated.[IMG]file:///C:/DOCUME%7E1/Owner/LOCALS%7E1/Temp/moz-screenshot-1.png[/IMG][IMG]file:///C:/DOCUME%7E1/Owner/LOCALS%7E1/Temp/moz-screenshot.png[/IMG]