(Solved): A donut such as is generated by rotating the circle, S, defined by (x4)2+y2=9 about the y-axis. ...

A donut such as is generated by rotating the circle, $S$, defined by $(x?4{)}^2+y^2=9$ about the $y$-axis. If the management of Dunkin Donuts wants to know how to price these donuts, use integral calculus to help them. (i) Set up a definite integral to determine the volume, $V_1$, of a donut