due to smoking, a terminal ill patiient loses approximately 2% of his lung capacity every 1 month. at this rate ,the beginninng at 100% capacity, what will the patient's lung capacity be in one year

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.