Question description
A factory begins emitting particulate matter into the
atmosphere at 8am each workday, with the emissions continuing until 6pm. The
level of pollutants, P ( t ), measured by a monitoring station Β½ mile away is
approximated as follows, where tΒ
represents the number of hours since 8am.Β
P(t)= {Β Β 75t+100Β if 0 is less than or equal to t less
than or equal to 4
Β Β 400Β
Β if 4
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