In this application, Patricia wishes to have a rectangular-shaped garden in her backyard, and we are looking for a function to describe the area of this garden in terms of x, the width of the garden. She has 82 ft of fencing with which to enclose her garden. Thus, the perimeter P (in ft) of the garden is P. letting x denote the width of the garden, find a function f in the variable x giving the area of the garden. what is its domain?