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Math Help - one graph, one related rates problem

  1. #1
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    one graph, one related rates problem

    one graph, one related rates problem-mathw.jpg i need solution



    Please start a new problem with a new thread.

    Now, what have you done with these two problems?
    Last edited by skeeter; December 23rd 2012 at 07:21 AM.
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  2. #2
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    Re: one graph, one related rates problem

    Hey yns177.

    We'll start with the first one: can you show us an attempt of graphing the function?
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    Re: one graph, one related rates problem

    one graph, one related rates problem-shadow-rate.png
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    Re: one graph, one related rates problem

    The rate of change of the angle, \frac{d\theta}{dt}, needs to be expressed in radians/minute:

    \frac{d\theta}{dt}=\frac{0.27\pi}{180}=0.00471

    So \frac{dx}{dt}=-80\csc^2{\theta}\frac{d\theta}{dt}=-80\left(\frac{100}{80}\right)^2(0.00471)=0.589 feet per minute

    - Hollywood
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  5. #5
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    Re: one graph, one related rates problem

    Who was it who originally posted the question?
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  6. #6
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    Re: one graph, one related rates problem

    Quote Originally Posted by HallsofIvy View Post
    Who was it who originally posted the question?
    The OP, yns177, piggybacked onto another thread. I moved it.
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