Last year bill opened an investment account with 7400$, at the end of the year, the amount decreased by 24.5%. how much did this decrease in dollars? how much money was in his account by the end of the year

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