7.5 (20.34) - 20 points: As a member of Engineers Without Borders, you are working in community that has contaminated drinking water. At t = 0, you add a disinfectants

contaminated with bacteria. You make the following measurements at several times thereafter:a cistern that If the water is safe to drink when the concentration falls below 5 #/100 mL, estimate the time at which the concentration will fall below this limit