At a particular sea level location at a particular time the atmospheric pressure is 14.8 lbs/in^2 and the temperature is 80 degrees F. Estimate the temp, pressure , and air density at an altitude of 8,000ft? 18,000 ft? Note: You must modify the standard atmosphere model using the given values for sea level air pressure and temperature

At a particular sea level location at a particular time the atmospheric pressure is 14.8 lbs/in^2 and the temperature is 80 degrees F. Estimate the temp, pressure , and air density at an altitude of 8,000ft? 18,000 ft? Note: You must modify the standard atmosphere model using the given values for sea level air pressure and temperature