Use the inequality 10cosx≥010cos⁡⁡x≥0 with a period [−2π,0][−2π,0] to answer the following questions. part a: which answer correctly explains the solution process of the inequality? part b: what does the period represent in this problem? select one answer for part a, and one answer for part b.

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