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3 October, 00:03

The equation h (t) = - 16t2+25t+80 gives the height of a ball, in feet, t seconds after it is thrown from a platform.

What is the initial velocity when the ball is thrown?

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  1. 3 October, 02:49
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    Take the derivitive

    h' (t) = - 32t+25

    initial is at t=0

    h' (0) = - 32 (0) + 25

    h' (0) = 0+25

    h' (0) = 25

    initial velocity is 25ft/sec
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