In 1980, about 2,180,000 U. S. workers worked at home. During the next ten years, the number of workers working at home increased by 5% per year. Based on this information, how many Americans were working at home in 1990? Round your final
answer to the nearest whole American worker.

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