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A covered mug of coffee originally at 190 degrees Fahrenheit, if left for t hours in...

A covered mug of coffee originally at 190 degrees Fahrenheit, if left for t hours in a room whose temperature is 60 degrees, will cool to a temperature of

60 + 130e−1.7t

degrees. Find the temperature of the coffee after the following amounts of time. (Round your answers to the nearest degree.)

(a) 15 minutes
°F

(b) half an hour
°F

Math   Calculus   
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