1. The problem statement, all variables and given/known data "Find a horizontal line y=k that divides the area between y=x^2 and y=9 into two parts" 2. Relevant equations 3. The attempt at a solution Found intersection at (-3,9), (3,9) Found total area to be 36, half(the area needed for each portion) to be 18. Don't know where to go from here.