SOLUTION: Let xy = 20. Find dy/dt given that x = 10 and dx/dt = −2

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Question 1058754: Let xy = 20. Find dy/dt given that x = 10 and dx/dt = −2
Answer by Alan3354(69443) About Me  (Show Source):
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Let xy = 20. Find dy/dt given that x = 10 and dx/dt = −2
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y = 20/x
dy/dt = -(20/x^2)dx/dt
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dy/dt = (-20/100)*(-2) = 2/5