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The distance $s$ in feet that a thrown object will fall in $t$ seconds is given by

$$s=16t^2 + vt\;,$$

where $v$ is the initial downward velocity in feet/second. Find the initial velocity of an object that falls $80$ feet in $2$ seconds.

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    What have you done? Where are you stuck?2012-11-13

2 Answers 2