=) A cup of water with a temperature of 90°C is placed in a room with a constan temperature of 24° C. After 15 minutes, the water temperature is 55° C. Newton's Law o dT cooling states that the rate at which an object cools is = k(T-T), where k is the dt %3D constant of proportionaity, T is the temperature of the object, and Tois the surrounding temperature. Use the Newton's Law to calculate the time for the water temperature to reach 30°C.

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