7. Mrs. Garcia is conducting an experiment in which students in her physics class drop eggs from the second story of the high school. She wants to know what the speed of each egg will be before the egg hits the ground. The acceleration due to gravity is 9.8 m/s?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola 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? write your answer as a decimal rounded to the nearest tenth