What is the domain of the function represented by the graph?

the graph of a quadratic function with a maximum value at the point (2,4) and zeros at 0 and 4

A.
x ≥ 0
B.
0 ≤ x ≤ 4
C.
all real numbers
D.
x ≤ 4

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