A toy rocket is launched form a 3m platform, at 8.2m/s. The height of the rocket is modelled by the equation h=-4.0t^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?
1 answer
this was answered when you were Rachel.