The atmospheric pressure p on a balloon or an aircraft decreases with increasing height This pressure measured 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 243 millimeters of mercury b Find the height of a mountain if the atmospheric pressure is 634 millimeters of mercury a The height of the aircraft is 7 86 kilometers Round to two decimal places as needed kilometers b The height of the mountain is Round to two decimal places as needed