Parabolas can be the only conic sections that are considered functions because they pass the vertical line test. We have worked with parabolas before in quadratic equations, but parabolas formed by conic sections are a little different.
Toilet drainage rough-in steps. 1  Cut a hole in the subfloor just large enough for the bottom part of the toilet flange to sit. 2  If your installing the drainage underground, excavate the trench and have a supply of clean backfill ready (sand or gravel) to grade and cover the pipe.
1 Apply Caulking: Apply a bead of caulking around the inside of each vent 1/4â³ in from the outer perimeter. 2  Position Vent: Center each soffit vent over the hole with the vents parallel to the eaves and the vent louvers facing in toward the house. 3  Attach Vent: Screw or nail each vent to the soffit board.