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September 20, 2014

September 20, 2014

Posted by **Lori** on Tuesday, October 16, 2012 at 5:31pm.

- calculus -
**Steve**, Tuesday, October 16, 2012 at 6:11pmif the distance from the plane to the observer is y, and the distance the plane has flown is x, all in km,

y^2 = 4^2 + x^2

2y dy/dt = 2x dx/dt

when x = 3, y=5

10 dy/dt = 2(3)(340)

dy/dt = 204 km/hr

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