Rectangle E G H J is shown. Point F is the midpoint of side E G and point I is the midpoint of side J H. The length of E F is 3, the length of F G is 3, and the lengths of G H and E J are 4. Through which points should a line of rotation be placed to create a cylinder with a radius of 3 units? E and J F and I J and G G and E

the answer is F and I

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