on [-3, 3]Calculus Contents: Applications of Integration
Average value of a centered parabola on [-3, 3]
Average value of a portion of a parabola 
on [1, 4]
Area between a linear and parabola along x
Disk method: parabola about x axis
Shell method: axis along x axis: Cone with a hole
Shell method: axis along y-axis: Cone with a hole