Askyscraper is being constructed to be the tallest in the world. during construction, the angle of elevation from the street 47.51 feet away is 89°. approximately how tall is the skyscraper at this point in construction? round to the nearest whole number. the building is approximately feet tall.

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