00:01
We are given curves and a specified line, and we're asked to find the volume of the solid obtained by rotating the region bounded by these curves about this line.
00:13
Also, we're asked to sketch the region, the solid, in a typical disk or washer.
00:19
The curves are 2x equals y squared, parabola, as well as x equals 0 and y equals 4, and the line that we rotate.
00:31
Is about the y -axis.
00:34
So first i'll sketch the region.
00:54
So first i'll sketch the parabola.
01:00
This has its vertex at the origin and also has the point 2 -2 as well as 2 negative 2.
01:41
We have the vertical line x equals 0, which looks like this, and we have the horizontal line y equals 4.
02:07
And so this area in red, this is our region.
02:14
So i'll actually delete this lower part.
02:17
It wasn't really necessary after all.
02:24
Now let's figure out some key points for this.
02:26
Region.
02:28
So we have the point here at the origin, zero zero.
02:31
We have this point here, which is 04...