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December 21, 2014

December 21, 2014

Posted by **Anon** on Friday, December 31, 2010 at 3:26pm.

- Calculus -
**Damon**, Friday, December 31, 2010 at 4:48pmx^2 = (45-20*t)^2 + 90^2

2 x dx/dt = 2 *(45-20t) (-20)

at x=sqrt(45^2+90^2) when t = 0

2 (100.6) dx/dt = 90*-20

dx/dt = -8.94 ft/s

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