Andrea has six times as many dimes as quarters. if her dimes and quarters total $12.75, how many of each coin does she have? a) 15 quarters and 90 dimes b) 10 quarters and 60 dimes c) 5 quarters and 30 dimes d) 15 quarters and 21 dimes

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.

This is different from the first one can someone me

Which two undefined geometric terms always describe figures with no beginning or end?