Aconstruction company has adjoined a 2000 ft^2 rectangular enclosure to its office building. three sides of the enclosure are fenced in. the side of the building adjacent to the enclosure is 200 ft long and a portion of this side is used as the fourth side of the enclosure. let x and y be the dimensions of the enclosure, where x is measured parallel to the building, and let be the length of fencing required for those dimensions. (a) find a formula for in terms of x and y. ,y)= x+2y (b) find a formula that expresses as a function of x alone. )= x+(4000/x) (c) what is the domain of the function in part (b)?