Bill kicks a rock off the top of his apartment

Question

building. It strikes a window across the street 17 m away.
The acceleration of gravity is 9.8 m/s2 .
If the window is 22 m below the position where Bill contacted the rock, how long was it in the air?
Answer in units of s

How fast was it moving when it left Bill’s foot?
Answer in units of m/s.
D=22
Vi=0
A=-9.8

Answer 1

I guess he kicked it horizontally?

Hi = 22

0 = Hi - (1/2)(10) t^2

4.4 = t^2
t = 2.1 seconds

goes 17 meters horizontal in 2.1 seconds
u = 17/2.1 = 8.1 m/s

Answer 2

I used g = -10, you do it with your g