2. McCabe Problem 2.2: The temperature of the earth's atmosphere drops about 5°C for every 1000m of elevation above the earth's surface. If the air temperature at ground level is 15°C

and the pressure is 760 mmHg, at what elevation is the pressure 380 mmHg? Assume that the air behaves as an ideal gas. Hint: You will need to use calculus, come up with an equation that relates temperature to height (Z)