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14 September, 17:28

On Julyâ 1, a pond was 22 ft deep. Since thatâ date, the water level has dropped two thirds ft per week. For what dates will the water level not exceed 18 âft?

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  1. 14 September, 17:32
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    Answer: The date in which the water level will not exceed 18ft is August 12 (6 weeks after July 1)

    Step-by-step explanation:

    Given:

    Initial water level = 22ft

    Final water level = 18ft

    Total water level change = 22-18 = 4ft

    Rate of change of water level = 2/3 ft/week

    Using the formula;

    Total change = rate * time

    Time = total change/rate

    Substituting the values of the rate and total water level change.

    Time = 4 / (2/3) week = 4 * 3 : 2 = 6weeks.

    From July 1 + 6 weeks = August 12

    The date in which the water level will not exceed 18ft is August 12 (6 weeks after July 1)
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