Whsat is the answer to .5343434343434343434

Can someone tell me if this is perpendicular? !

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

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