On average, people of a certain country spend 20.5 hr per month watching videos on a computer or on a television. They spend 2.1 more hours watching videos on a television than on a computer. How much time do they spend on each?

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