A baker is baking a three-tiered cake where each tier is centered on the one below it. A diagram of the front of the cake is included below. What is the total area of the front of the cake that the baker would need to cover with frosting? Help me, please.

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