a. The rectangle has the area of 16m^2. Determine the function which expresses its perimeter,p, in terms of x, length of one of its side.
b. Megan and Hayin wish to fence in the rectangular vegetable garden and subdivide it into 3 regions using two additional sections of fence parallel to one side, x, of rectangle. Total enclosed area is to be 2000 ft^2. State total length of fencing as the function of x.