Answer:
If you have any questions I can try to help :)
Step-by-step explanation:
I'm sorry people keep doing that to you
and thank you for the points <3
Hey!! I got 90cm for the answer
30*85 multiply those to numbers and then multiply 45 120
Answer:
9.6 seconds
Step-by-step explanation:
The equation for projectile motion in feet is
where
is the initial velocity in ft/s and
is the initial height in feet.
We are given that the initial upward velocity is
and the initial height is
. Thus, plugging these values into our equation, we get
as our equation for the situation.
The firework will land, assuming it doesn't explode, when
, thus:

Since time can't be negative, then the firework will land after 9.6 seconds, assuming it doesn't explode at the time of landing.