Answer:
do not worry bro you will know how to use it
Answer: i personally think it would be 789
Explanation:
Hopefully I am right
I believe it is a conductor I am learning this myself so I may be wrong
If ball remains in air for total time T = 0.85 s
this is also known as time of flight
In order to find the time of flight we can use kinematics

so for complete motion its displacement in y direction will be zero



now we know that net velocity of the ball is 8 m/s
while is y direction component we got is vy = 4.165 m/s
now by component method we can say




so it is projected at an angle of 31.4 degree above horizontal