4. [-/5 Points] DETAILS MY NOT A billboard designer has decided that a sign should have 2-ft margins at the top and bottom and 5-ft margins on the left and right sides. Furthermore, the billboard should have a total area of 250 ft2 (including the margins). If x denotes the width (in feet) of the billboard, find a function in the variable x giving the area of the printed region of the billboard. 290 - 10x _ 1000 O 270 - 4x + 1250 290 - 4 - 2500 260 - 2x - 1250 270 - 2 - 2500 X What is the domain of the function? (0,125/2] [10,125/2] [10,09) (0,00) O (-60,0) U (0,00) 5. [-/5 Points] DETAILS MY NOTE x + 42 if x 3 O Limit does not exist O 10 Oo o