Solve and check.-14 + n = 20

A. n = -6
B. n = 34
C. n = 6
D. n = -34

Answer: B

Mathematics

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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

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where is measured in pollutant standard index (PSI) and t is measured in hours, with corresponding to a.m.
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Use the second derivative test to find the approximate value of t where the function A has a relative maximum. Round to the nearest integer.
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A.
B.
C.
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E.