The diagram shows a prism placed on a horizontal floor. The prism has height 3m. The volume of the prism is 18m^3. The pressure on the floor due to the prism is 75 Newton's/m^2. Work out the force exerted by the prism on the floor. Please help, it would mean a lot :)

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