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A cake is taken out of the oven at a temperature of 293°F, Six minutes later...

A cake is taken out of the oven at a temperature of 293°F, Six minutes later its temperature is 205°F. If the rate of change of the temperature T(t) is proportional to the difference between body´s temperature and its surroundings To = 66°F, how long it will take to be at a temperature of 98°F?

Please show the solution step by step, make sure the procedure is legible please

The answer is 23.98 minutes

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