Santiago receives $200 per year in Simple interest from three investments. Part is invested at 2%, part at 3%, in part at 4%,. There is $500 more invested at 3% done at 2%. The amount invested at 4% is four times the amount invested at 3%. Find the amount invested at each rate

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