A plane takes off and rises to an elevation of 2500 feet. During the next hour, it rises another 1200 ft, drops 800 ft., and descends another 550 ft as it flies over the ocean. What is the elevation of the plane as it flies over the ocean?
The plane rises by 2500 ft, then rises another 1200 ft, then drops 800 ft, and finally descends another 550 ft. The total change in elevation is 2500+1200-800-550=<<2500+1200-800-550=2350>>2350 ft. Answer: \boxed{2350}.
