calculus

a rectangle is 10 inches by 6 inches whose sides are changing. write a formula for both the perimeter and how fast each is changing in terms of L and W

how do i do this, an explanation instead of an answer would be most appreciated, thanks in advance.

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asked by eric
  1. express P and A as a function of L and W

    Then just use the chain rule to find the derivative (d/dt)

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