The Nygen family wants to put a circular fence around their pool. They want it to be exactly 11 feet from the center of the pool. How many feet of fencing do they need to buy?
We can find this out by using the parameter equation for a circle r = radius = 11 [tex]p = 2\pi r[/tex] [tex]p = 2\times\pi\times 11[/tex] p = 69.115 If we round p = 69.12