A roast is taken from the refrigerator (where the temperature is 40 F) and put in a 350 F oven. One hour later, the meat thermometer shows a temperature of 900 F. If the roast is done when its temperature reaches 145 F what is the total time the roast should be in the oven? Newton's Law of Cooling says that the rate of change of temperature is proportional to the difference between the temperature of the object and the temperature of the surrounding air. Round your answer to 2 decimal places. t: hours