Essay
The level of ozone, an invisible gas that irritates and impairs breathing, present in the atmosphere on a certain May day in the city was approximated by
, where
is measured in pollutant standard index (PSI) and t is measured in hours, with
corresponding to 7
a.m. Use the second derivative test to show that the function A has a relative maximum at approximately . Interpret your results.
Correct Answer:

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The first two derivatives of A are given...View Answer
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