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) ; ;

Question

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) ; ;

Quizplus · Accepted Answer

To find the values of A at different times, we need to plug in the corresponding values of t in the given equation:

At 9 a.m. (t = 2 hours): A(2) = 11eaa8b1_dbf9_f2fb_b1b6_a1698c514669_TB6026_11
At 11 a.m. (t = 4 hours): A(4) = 11eaa8b1_dbfa_1a0c_b1b6_675459b31052_TB6026_11
At 3 p.m. (t = 8 hours): A(8) = 11eaa8b1_dbfa_1a0d_b1b6_fb89c6dccb18_TB6026_11

Therefore, the correct answer is C.

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