A circle is graphed on this coordinate plane (in the photo) What is the radius, in units, of the circle. Show you’re work. ill give brainlest to the best answer (: NO LINKS LINKS GET REPORTED

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