Tighe starts at sea level and hikes up to an elevation of 70 ft. Then he descends(walks down) in the direction of his starting point to an elevation of 30 ft. Tighe says the integer −30 represents his

Tighe starts at sea level and hikes up to an elevation of 70 ft. Then he descends(walks down) in the direction of his starting point to an elevation of 30 ft. Tighe says the integer −30 represents his elevation at this point. Is Tighe correct? Explain your reasoning.

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Tighe starts at sea level and hikes up to an elevation of 70 ft. Then he descends(walks down) in the direction of his starting point to an elevation of 30 ft. Tighe says the int…

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