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Alex walks from 8 a.m. to 9 a.m. along a continuous mountain trail. At 8 a.m., Alex is 0m above sea level. At 9 a.m.

Alex walks from 8 a.m. to 9 a.m. along a continuous mountain trail. At 8 a.m., Alex is 0m above sea level. At 9 a.m. Alex is 100m above sea level. Explain why sometime between 8 a.m. and 9 a.m. that Alex is exactly 46m above sea level.

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