00:01
Okay, so for this problem, we are looking at y equals the square root of x.
00:06
So if we look at this graphically, we have the square root of x, but we are also bounded by y equals zero and x equals four.
00:17
So if we look at this, this will be where x equals four.
00:21
And then of course we know that the axis is y equals zero.
00:26
So we are essentially looking at this little area in here.
00:31
Okay.
00:32
So we're using the, so first off, we're on the interval 0 to 4 because x cannot be less than 0 because it's a square root.
00:41
The next thing we want to do is we want to look at the area of the semicircle.
00:44
So we know that the area of a circle is pi r squared.
00:48
Semi -circles half, so it's going to be half of that...