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A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m higher than the bow of the boat. If the rope is pulled in at a rate of 1 m/s, how fast is the boat approaching the dock when it is 9 m from the dock?

I am getting "-[(82)^(1/2)]/9", but the computer isn't liking it.

  • calculus -

    I also get -√82/9 m/s

    The negative signs shows me that the distance between the dock and the boat is decreasing.
    Try entering the positive result of that.
    or the decimal equivalent of 1.006

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