Explanation: The area formula is length times width (L*w=a). We know that the area is 64in^2 (a=64) and the length is 32in (L=32), so we put those values into the equation and get 32*w=64. We then get w by itself by dividing both sides by 32, and get w=2. so the width is 2 inches.
The change in the temperature is proportional to the difference in temperatures. Let's call the initial temperature of the room and the thermometer and the current temperature where is the elapsed time in minutes. The outside temperature is 20 F.