Can someone help me with a math problem

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

Polynomial that can be factored as (3x-4)(3x+4)

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.