If a rectangular billboard has an area of 104 square feet and a perimeter of 42 feet, what is the length of each of the longer sides? Choose the correct choice
A) 4	B) 7	C) 8	D) 13	E) 26
This question can be solved algebraically or by TESTing THE ANSWERS.   We're told that a rectangle has an area of 104 and a perimeter of 42. We're asked for the length of one of the LONGER sides of the rectangle.   Since the answers are all INTEGERS, and the area is 104, the shorter side will almost certainly be less than 10 (since 10x10 = 100, but we're NOT dealing with a square). Answer B (7) does NOT divide evenly into 104, so the correct answer is probably A or C.   Let's TEST Answer C: 8   IF...   The shorter side = 8...   The area = 104....104/8 = 13 = the longer side   Perimeter = 8+8+13+13= 
<gadget id="calculator">8+8+13+13</gadget>
<output>42</output>
42   13
<result>D</result>
If a rectangular billboard has an area of 104 square feet and a perimeter of 42 feet, what is the length of each of the longer sides?