A zoo needs to build a rectangular enclosure that is made up of a 15 foot brick retaining wall on one side and a 10 foot chain link fence topping a two foot high brick wall on the other three sides The brick retaining wall costs 280 dollars per foot and the chain link brick fence costs about 73 per foot What dimensions will minimize the cost to build an enclosure that holds an area of 1900 square feet The brick retaining wall will be about feet long The chain link fence just one of the sides adjacent to the brick wall not opposite will be about feet long