It was calculated that 75 men can complete a piece of work in 20 days. when work was scheduled to commence, it was found necessary to send 25 men to another project. how much longer will it take to complete the work?

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