physics question! 2?

Question

1.)A rocket rises vertically from rest, with an acceleration of
3.2 m/sec square until it runs out of fuel at an altitiude of 1200 meter.
After this point, its acceleration is that of gravity, downward.
(A.)- What is the velocity of the rocket when it runs out of fuel.
(B.)- How long does it take to reach this point?
(C.)- What maximum altitude does the rocket reach?
(D.)- how much time (total) does it take to reach maximum altitude?
(E.)- With what velocity does the rocket strike the Earth.
(F.)- How long (total) is it in the air?

2.)If there were no air resistance, how long would it take a free-falling parachutist to fall from a plane at 3200 meters to an altitude of 350 meters, where she will pull her ripcord? What would her speed be at 250 m? (in reality the air resistance will restrict her speed to perhaps 150 km/hr.)

Answer 1

A) v =sqrt( 2*(9.8-3.2)*1200) = 125.86 m/s

B) t = v/(9.8-3.2) = 125.86/6.6 = 19.07 s

C) S = v*v/2*9.8 + 1200 = 2008.201 m

D) t = 125.86/9.8 + 19.07 = 31.91 s

E) v = sqrt(2*9.8*2008.201) = 198.39 m/s

F) t = sqrt(2*2008.201/9.8) + 31.91 = 52.15 s

Answer 2

Why so many questions...
I'll only answer B ( its the easiest one...)
V=d/t
3.2m/s=1200/t
t=1200/3.2m/s
t=375 segonds