As a salesperson you are pay $50 per week plus $2 for sale this week you want your pee to be at least $100 what is the minimum number of sales you must make to earn at least $100

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