00:02
Okay, in this problem we have a dartboard and then a bull's eye, right? we have our dartboard and then here's our bullseye.
00:09
It says that the radius of the bullseye is 1 .5.
00:12
Then it says that the diameter of the whole dartboard is 10.
00:16
So we're going to go ahead and cut that in half and find the radius of five.
00:20
So what we need to do here, of course this doesn't look like a circle.
00:23
It looks more like an egg, but that's okay.
00:24
It's just a sketch.
00:26
What we're going to do here is we're going to take the area of the bullseye, which is going to be pi r squared, which is pi times 1 .5 squared.
00:35
And then we're going to divide it by the area of the whole forward, which is going to be pi times five squared.
00:45
Now, this would be a lot easier if they didn't want us to give the area of each because the pies just cancel out.
00:52
And when we divide 1 .5 squared, divided by 5 squared, we're going to get 0 .09...