Question

Anyone know a good website that helps with Volume of the area between 2 functions? (with Integrals)

Answer 1

Volume of the area? I think you mean volume of the solid generated by revolving the area between two functions.

You can always rely on Paul's Notes, which have plenty of examples and practice problems.

Disk/washer method: http://tutorial.math.lamar.edu/Classes/CalcI/VolumeWithRings.aspx

Shell method: http://tutorial.math.lamar.edu/Classes/CalcI/VolumeWithCylinder.aspx

Arc length: http://tutorial.math.lamar.edu/Classes/CalcII/ArcLength.aspx

Surface area: http://tutorial.math.lamar.edu/Classes/CalcII/SurfaceArea.aspx