The Level of Ozone, an Invisible Gas That Irritates and Impairs

question 127

Multiple Choice

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 is measured in hours, with corresponding to a.m. Use the second derivative test to find the approximate value of where the function has a relative maximum. Round to the nearest integer.

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