Question 987005
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{{{-16t^2-5t+470=d}}}
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{{{-16t^2-5t+470=446}}}
{{{-16t^2-5t+24=0}}}
*[invoke quadratic "t", -16, -5, 24 ]
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t=1.08 seconds
ANSWER:The rock is 446 feet from the ground after 1.08 seconds.
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Rock hits ground when d-0
{{{-16t^2-5t+470=0}}}
*[invoke quadratic "t", -16, -5, 470 ]
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t=5.27 seconds
ANSWER: The rock hits the ground after 5.27 seconds.