Question

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 +
130*e*^{−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

Answer #1

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