Charlie does the following problem: 3 3 • 3 2 = 3 6 = 3 • 3 • 3 • 3 • 3 • 3 = 729. which of the following is a true statement? a he is incorrect because he should have 6 factors of 9. b he is incorrect because he should have only 5 factors of 3. c he is incorrect because he should have 3 factors of 6. d he is correct.

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