Mathematics, 05.07.2019 22:30 ImGoodAtLife7797
Arocket is launched into the air and follows the path, h (t) = -3 * t^2 + 12 * t t is time measured in seconds. determine how long it takes the rocket to hit the ground. show all work for full credit. my lesson didn't really explain this well for me. either that or i'm not getting it. could someone explain this a bit better? !
Answers: 1
![\bf h(t)=-3t^2+12t\implies \stackrel{h(t)}{0}=-3t^2+12t\implies 0=-3t(t-4)\\\\[-0.35em]~\dotfill\\\\0=-3t\implies 0=t\impliedby \textit{0 seconds when it took off from the ground}\\\\[-0.35em]~\dotfill\\\\0=t-4\implies 4=t\impliedby \textit{4 seconds later, it came back down}](/tpl/images/0055/6496/5e770.png)
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Arocket is launched into the air and follows the path, h (t) = -3 * t^2 + 12 * t t is time measured...
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