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22 November, 11:20

A miner descended 1200 feet into a mine. While in the mine, he then rose 900 feet and then descended 350 feet. What was the miner's net gain or loss in altitude? A. - 1200 ft B. 650 ft C. - 650 ft D. 50 ft

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  1. 22 November, 11:39
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    We can just add all these numbers together because they are just addition and subtraction.

    We assume the miner starts at 0 (the surface).

    0 - 1200 (down) + 900 (up) - 350 (down) = - 650 (C)
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