Air pollution the level of ozone an invisible gas that

Question

Question: AIR POLLUTION The level of ozone, an invisible gas that irritates and impairs breathing, present in the atmosphere on a certain day in June in the city of Riverside is approximated by

S(t) = 1.0974t³ - 0.0915t⁴           (0 ≤ t ≤ 11)

Where S(t) is measured in pollutant standard index (PSI) and t is measured in hours, with t = 0 corresponding to 7 a.m. Sketch the graph of S and interpret your results.