I'll mark you the most if you can solve these.

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.

Hundred and tens tables to make 430 in five different ways

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?