Grading System 1 Grading System II Test average-40% Test average-60% Final exam grade-25% Final exam grade-15% Homework-25% Homework-15% Class participation-10% Class participation-10% If your values are the following, which grading system do you prefer and why? Test average = 84 Final exam grade = 68 Homework = 90 Class participation = 95 . .

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