A large held is next to a building that is over 100 feet tall. A group of kids take turn throwing balls into the air from different starting height. Would any of the kids be able to throw a ball on the roof of the building? How can you use the discriminant to
determine whether any of the tosses could have made it to the roof?

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