Figure 1		Figure 2

Tessa has 42 ft of fencing available to construct a fence that will divide her garden into two rectangular sections. Her house forms one side of the garden and $x$ represents the width, as shown in Figure 1.

(a) Express the total area of the two sections as a function of x.

     $A(x) =$

(b) Find the domain of the function. Write your answer as a compound inequality involving $x$.

      Domain of $A(x)$:

(c) Using the graph of $A(x)$ shown in Figure 2, determine the dimensions that yield the maximum area.

      Width: ft

      Length: ft