A rectangle deck cost $28.00 per square to build. The rectangle deck is 9 meters wide and 10 meters long. How much did it cost to build the rectangle deck?

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas