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If a cup of coffee has temperature 91C in a room where the ambient air temperature is 25C, then, according to Newton's Law of Cooling,

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If a cup of coffee has temperature 91C in a room where the ambient air temperature is 25C, then, according to Newton's Law of Cooling, the temperature of the coffee after t minutes is T(t)=25+66et/55. What is the average temperature of the coffee during the first 16 minutes

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