Jp has two jobs. he makes $12 an hour as a bus boy. he makes $21 an hour working construction. he works 52 hours and makes $966. how many hours did he spend at each job?

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