Peggy was taking a timed 30-question test. She was able to correctly answer 90% of the questions but had to skip the rest. How many questions did Peggy answer correctly?

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