The Equation $P ( a ) = 14.7 e ^ { - 0.21 a }$

Short Answer

The equation $P ( a ) = 14.7 e ^ { - 0.21 a }$ , where a is the altitude above sea level measured in miles, yields the atmospheric pressure in pounds per square inch. If the atmospheric pressure at Cheyenne, Wyoming, is approximately 11.84 pounds per square inch, find that city s altitude above sea level. Express your answer to the nearest hundred feet. Please enter your answer as a number without the units. __________ feet