In a certain suburb of Los Angeles, the level of ozone L(t) at 7:00 A.M. is 0.25 parts per million (ppm). A 12-hour weather forecast predicts that the ozone level t hours later will be changing at the rate of

parts per million per hour (ppm/hr).

a. Express the ozone level L(t) as a function of t. When does the peak ozone level occur? What is the peak level?

b. Use the graphing utility of your calculator to sketch the graph of L(t), and use TRACE and ZOOM to answer the questions in part (a). Then determine at what other time the ozone level will be the same as it is at 11:00 A.M.

Transcribed Image Text:

L' (t) 0.24 - 0.03t V36 + 16t - 1²