You will construct a fenced in area along the side of a building. The pen will be in the shape of a right triangle, and the hypotenuse will be formed by the building, so no fencing is needed there. The base side of the triangle will be wood fencing, which costs $5/foot, and the height side of the triangle will be metal fencing, which costs $3/foot. If the area of the pen must equal 300 ft2 (and the area of a triangle is 1/2 base x height), what dimensions would MINIMIZE COST