A toy rocket is launched form a 3m platform, at 8.2m/s. The height of the rocket is modelled by the equation h=-4.9t^2+8.1t+3 where h is the height, in metres, above the ground and t is the time, in seconds.
After how many seconds will the rocket rise to a height of 6m above the ground?
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look back when you posted this earlier
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