Find the volume of the solid that results when the region enclosed by , y=0 and x=9 is revolved about the line y=3.
Here is the image:
Now the problem is that I can't even imagine the revolution. What figure would come up when the revolution is done?
Should the volume be
This is so strange.
It seems like the graphic of is below the y=9 axis, which is not actually consistent with the definition.
It is like revolution of negative function around the x-axis. Very strange.