NED HELP ASAP

This person is in my basement
Dont try to help them

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

What is the lcm of 16 and 40 ? 24 and 40 ?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m