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January 28, 2015

January 28, 2015

Posted by **stephen** on Saturday, January 1, 2011 at 7:12pm.

- math -
**Damon**, Saturday, January 1, 2011 at 7:32pmthis teacher likes negative derivatives

h^2 = x^2 + y^2

2 h dh/dt = 2 x dx/dt + 2 y dy/dt

dx/dt = -15

dy/dt = -20

h at t = 0 is 500

2 (500)dh/dt = 2 (300)(-15) + 2(400)(-20)

enough

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