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March 26, 2017

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Ice is forming in a pond at a rate given by dy/dx=ksqrt(t), where y is the thickness of the ice in cm at time t measured in hours since the ice started forming, and k is a positive constant. Find y as a function of t.

  • Calculus - ,

    dy/dx=ksqrt(t)
    dy=ksqrt(t)dt
    Integrate both sides:
    y=k(2/3)t^(3/2) + C
    where C is an integration constant determined from initial conditions.

    Thus
    y = (2k/3)t^(3/2) + C

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