Question: The atmospheric pressure p on a balloon or an aircraft decreases with increasing height. This pressure measures in millimeters of mercury, is related to the height

h ( in kilometers) above sea level by the formula p = \[760{{e}^{-0.145h}}\]

a) Find the height of an aircraft if the atmospheric pressure is 320 millimeters of mercury.

b) Find the height of a mountain if the atmospheric pressure is 667 millimeters of mercury.