12. DETAILS TANAPCALCBR10 4.4.058. MY NOTES ASK YOUR TEACHER Air Pollution The amount of nitrogen dioxide, a brown gas that impairs breathing, present in the atmosphere on a certain May day in the city of Long Beach is approximated by 129 A(t) = + 27 (0 s t = 11) 1 + 0.23(t - 7)2 where A(t) is measured in pollutant standard index (PSI) and t is measured in hours, with t = 0 corresponding to 7 A.M. Determine the time of day when the pollution is at its highest level. time ---Select--- Submit