The differential equation below models the temperature of an 93°C cup of coffee in a 17°C room, where it is known that the coffee cools at a rate of 1°C per minute when its temperature is 67°C. Solve the differential equation to find an expression for the temperature of the coffee at time t. (Let y be the temperature of the cup of coffee in °C, and let t be the time in minutes, with  t = 0  corresponding to the time when the temperature was 93°C.)   dy dt = −  1 50(y − 17)

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