According to the South Coast Air Quality Management District, the Level

Multiple Choice

According to the South Coast Air Quality Management District, the level of nitrogen dioxide, a brown gas that impairs breathing, present in the atmosphere on a certain May day in downtown Los Angeles is approximated by , where A(t) is measured in pollutant standard index and t is measured in hours, with corresponding to 7 a.m. Find , , .

A) ;
;

B) ;
;

C) ;
;

D) ;
;

E) ;
;