Shari has 1 1/2 gallons of orange juice. she wants to serve the orange juice equally among her 12 friends. how many ounces of juice will each friend receive

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