In bungee jumping, a bungee jump is the amount the cord will stretch at the bottom of the fall. The stiffness of the cord is related to the amount of stretch by the equation $K = \frac{2W(S + L)}{S^2}$, where $W$ is the weight of the jumper in pounds, $K$ is the cord's stiffness in pounds per foot, $L$ is the free length of the cord in feet, and $S$ is the stretch in feet.



Use this equation to answer the following:



A 210-pound person plans to jump off a ledge attached to a cord of length 33 feet. If the stiffness of the cord is no less than 13 pounds per foot, how much will the cord stretch?