Kelly stands 24 metres west of john. john starts walking north at a speed of 1.5 m/s and kelly starts walking east at the same time at a speed of 2 m/s. at what rate is the distance between john and kelly changing 6 seconds later? is the distance increasing or decreasing?

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