Connie's boat travels at 6mph. find the rate of the current of the river if she can travel 16 miles upstream in the same time she can travel 32 miles downstream

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