A billboard designer has decided that a sign should have 2-ft margins at the top and bottom and 4-ft margins on the left and right sides. Furthermore, the billboard should have a total area of 550 Ft2 (including the margins}. l$l Ifx denotes the width (in 'eet) of the billboard, nd a function in the variable x giving the area of the printed region of the billboard. Area, as a function of x = Determine the domain of the function for area. Enter your answer using interval notation. Domain of the funcon for area =