00:01
The first thing that you have to do is figure out the bounds.
00:04
So x squared plus y squared is 16, and r squared is equal to x squared plus y squared.
00:13
So this gives us that r is equal to square to 16, which is 4.
00:20
And we're inside the cylinder.
00:23
So we just have to be less than or equal to 4.
00:28
And r should be positive as well.
00:32
And theta, not really any restrictions on theta, but we don't want to repeat ourselves.
00:38
So just make theta between 0 and 2 pi.
00:41
That way no angles occur more than once.
00:44
And the boundaries for z are provided for us.
00:50
Z is between 4 and 25.
00:54
And then, so that's all of our bounds.
00:56
And then here we have square root of x squared plus y squared.
01:02
So that's the square root of r squared...