Atoy rocket is launched from a 4.24.2 m high platform in such a way that its height, h (in meters), after t seconds is given by the equation h equals negative 4.9 t squared plus 28.7 t plus 4.2h=−4.9t2+28.7t+4.2. how long will it take for the rocket to hit the ground?

 The toy rocket will take 6 seconds before it reaches ground.

Explanation:

 We have Height of toy rocket,

  When it reaches ground the height of toy rocket = 0 meter.

  Substituting

   So t = 6 seconds and t = -0.143 seconds( negative time is not possible)

   So the toy rocket will take 6 seconds before it reaches ground.

step-by-step explanation:

we are given

we have to simplify it

firstly, we will factor it

now, we can cancel like terms

now, we can combine it

so, we get

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation: