Find the level of pollution at nine am and eleven am

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Reference no: EM131020748

A factory begins emitting particulate matter into the atmosphere at 8 am each workday, with the emissions continuing until 4 pm. The level of pollutants, P(t), measured by a monitoring station ½ mile away is approximated as follows, where t represents the number of hours since 8 am:

75t + 100           if 0 is less than or equal to t and less than or equal to 4

400                                if 4 is less than t or less than 8

P(t) =      -100t + 1200       if 8 is less than or equal to t or less than or equal to 10

-50/7 t + 1900/7  if 10 less than t or less than 24  

Find the level of pollution at

(a) 9am                 (b) 11am

(c) 5pm                 (d) 7pm

(e) midnight          (f) Graph y = P(t)

(g) From the graph in part (f), at what time(s) is the pollution level highest? Lowest?

Reference no: EM131020748

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