Which of the following is not a characteristic of non-euclidean geometry?

a.
space is saddle-curved.
b.
the parallel postulate is false.
c
there are no straight lines.

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