Question

Mount McKinley, 6194 m (20,320 ft); air pressure at the summit?

Answer 1

Pressure above sea level can be found using:
P = 101,325(1 - 2.25577 x 10⁻⁵ x h)^(5.25588)
P = 101,325(1 - 2.25577 x 10⁻⁵ x 6,194)^(5.25588)
P = 45,940 Pa