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19 October, 09:05

the floor of a canyon has an elevation of - 6.5 feet erosion causes the elevation to change by - 0.25 feet per year. How many years will it take for the canyon floor to have an elevation of - 20 feet.

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  1. 19 October, 09:16
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    54

    Step-by-step explanation:

    20 - 6.5 = 13.5

    13.5 / 0.25 = 54

    It would take 54 years for the canyon to erode 13.5 more feet to bring to - 20 elevation.
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