a. A rectangular pen is built with one side against a ham. lf2300 m offencing are used for the other three sides ofthe pen, 1what dimensions maximize the area of the pen? I). A rancher plans to make four identical and adjacent rectangular pens against a barn, each 1with an area of 100 m2 {see gure). What are the dimensions of each pen that minimize the amount of fence that must be used? a. To maximize the area of the pen, the sides perpendicular to the ham should he D m long and the side parallel to the barn should be D m long. (Type exact answers, using radicals as needed.)