Life Sciences 53. Pollution A marshy region used for agricultural drainage has become contaminated with selenium. It has been determined that flushing the area with clean water will reduce the selenium for a while, but it will then begin to build up again. A biologist me has found that the percent of selenium in the soil x months after the flushing begins is given by Gene Area figure. made circle. for th x² + 36 f(x) = 2x 1 ≤ x ≤ 12. When will the selenium be reduced to a minimum? What is the minimum percent? H