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Much greater than I would have expected. I expected it to be very small. The change in the circumference is minuscule: 3/(24,000×5,280) about 1/(8000×5000), ~1/40,000,000. Surprisingly it gets it all back when you multiply by the radius of the earth, to get the change in radius i.e. height. The radius is also a non trivial number when expressed in feet: 4000×5000, ~20,000,000