Answer: Amount of vertical change in Donald's trip = 9116 ft
Donald climbed down the mountain from the peak which is at a height of 14,342 ft. That is,
Donald's initial vertical position = 14,342 ft
She climbed down the mountain at 5226 ft above sea level, that is:
Donald's final vertical position = 5,226 ft
Amount of vertical change in Donald's trip = Initial Verical Position - Final vertical position
Amount of vertical change in Donald's trip = 14342 - 5226
Amount of vertical change in Donald's trip = 9116 ft