What is the simplest form of the square root of 324 times a squared times b to the power of 6? (assume that a is greater than or equal to zero and b is greater than or equal to zero)
A. 18ab to the power of 3
B. 18b to the power of 4
C. 162ab to the power of 3
D. 162ab to the power of 4

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.