If the Temperature Is Constant, Then the Atmospheric Pressure P

Short Answer

If the temperature is constant, then the atmospheric pressure P (in pounds/square inch) varies with the altitude above sea level h in accordance with the law , where p​₀ is the atmospheric pressure at sea level and k is a constant.
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If the atmospheric pressure is 17 lb/in.² at sea level and 12.5 lb/in.² at 6,000 ft, find the atmospheric pressure at an altitude of 18,000 ft. Please round the answer to one decimal place.
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__________ lb/in.²
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How fast is the atmospheric pressure changing with respect to altitude at an altitude of 18,000 ft? Please round the answer to four decimal places.
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__________ lb/in.²/ft