Remember the old song "500 Miles Away From Home"? Think of it as a challenge instead of a lament and you could come up with some good ideas for a road trip. You can do it the old-fashioned way, ...

So you have a circle. What is the area of that circle? Surely everyone remembers that the area of a circle is: Where Pi (π) is of course the number and r is the radius of the circle. Where does this ...