2 pounds of dried cranberries cost five dollars and 43 pounds of dried cranberries cost $7.56 and 7 pounds of dry pair dried cranberries cost $17.64 which equation gift to total cost wise of Xpress dry cranberries

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola 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? write your answer as a decimal rounded to the nearest tenth