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September 22, 2014

September 22, 2014

Posted by **Ken** on Sunday, November 25, 2012 at 10:07pm.

- Math Calc -
**Steve**, Monday, November 26, 2012 at 12:09amx^2 + y^2 = 25

2x dx/dt + 2y dy/dt = 0

2(-4) dx/dt + 2(3)(9) = 0

-8 dx/dt + 54 = 0

dx/dt = 54/8 = 27/4 = 6.75

makes sense; the particle is moving up to the right.

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