PLS HELP ASAP Cherries cost d dollars per pound. Mother bought 3 lbs and father bought 2 lbs. How much money did they spend together on cherries? PLS HELP ASAP

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.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Which is f(5) for the function –2x2 + 2x - 3?