Answer: 458 meters
Explanation:
Given: The e horizontal distance from the airplane to the atoll = 3,729 meters.
The angle of depression is = 7°
⇒ The angle of elevation from the atoll on ground =7° [Alternate angle property]
Let h be the height of the plane .
By trigonometry,

Thus, the height of the plane to the nearest meter is 458 meters.