SOLUTION: What is the difference in elevation between a plane flying 26,500 feet above sea leve, and a submarine traveling 650 feet below sea level. Please help solve this. Thanks

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Question 69495: What is the difference in elevation between a plane flying 26,500 feet above sea leve, and a submarine traveling 650 feet below sea level.
Please help solve this.
Thanks
Answer by josmiceli(6786) About Me  (Show Source):
You can put this solution on YOUR website!
Choose sea level = 0
p = plane's elevation
s = subs elevation
d = difference in elevations
d+=+p+-+s
p's elevation is (0 + 26500)
s's elevation is (0 - 650)
d = p - s
d = (0 + 26500) - (0 - 650)
d = 26500 + 650
d = 27150 answer