Mr. Zul saves a total of RM30 000 in Bank A and Bank B. The interest rates of Bank A and Bank B are 8% and 5% per annum respectively. The total interest for the saving in a year is RM2220. Find the total principal in Bank A and Bank 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