An object is placed in a container of liquid whose temperature is kept at 60°C. The object's initial temperature is −50°C and warms to 20°C in 45 seconds. Use Newton's Law of Cooling to find the time necessary for the object to reach a temperature of 40°C. (Newton's Law of Cooling is given by dT dt = k(T − TE), where T(t) is the temperature of the object, TE is the temperature of the environment, and k is a constant. Round your answer to two decimal places.)
