after the coffee is heated to 200 degrees , it is set in a room at 50 degrees.It cools at a rate that is proportional to the difference between its current temperature and that of the surrounding atmosphere. Let C(t) be the difference between the temperature of the coffee and the temperature of the coffee and that of the room, where t is time measured minutes after the coffee starts cooling. When t=0, the rate of cooling 2 degrees/min.

Write the equation for D(t). How long will it take for the mik to cool to 120 degrees.

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