It takes 4.3 seconds for the rocket to return to earth.
The equation is:

where -9.8m/sec² is the acceleration due to gravity, v₀ is the initial velocity, and h₀ is the initial height. We will go from the assumption that the rocket is launched from the ground, so h₀=0, and we are told that the initial velocity, v₀, is 42. This gives us:

We will use the quadratic formula to solve this. The quadratic formula is:

Plugging in our information we have:

x=0 is when the rocket is launched; x=4.3 is when the rocket lands.
Answer:
A, B, E area ll less than 0
Step-by-step explanation:
They are all negative numbers.
Answer:
The table on the right, the green table, is the one that shows a proportional relationship
Step-by-step explanation:
Answer:
1020 POUNDS.
Step-by-step explanation:
i think im not sure if i am wrong tell me and i wiil redo! :)