Atmospheric Pressure Is the Pressure Exerted on an Area from the Weight

Atmospheric pressure is the pressure exerted on an area from the weight of the atmosphere above it.Pressure is often measured in pounds per square inch psi) and in units called millibars mb) .Normal air pressure at sea level is approximately 14.7 psi or 1,013 mb.At the top of Mount Everest,the air is only 33% as dense as it is at sea level,and the air pressure is approximately 333 mb.Denver,Colorado,at an elevation of 5,280 feet,has an average air pressure of 834 mb.The air in Denver is___________ as dense as it is at sea level.

A) 121%
B) 16%
C) 82%
D) 67%