Ryan rolls a steel ball horizonyally at 0.8m/s from a top of a lab table that is 0.95 m high. a) how long will it take the stone to strike the ground? b) how far from the edge of the table did the ball travel?

For part a we can use the kinematic formula distance= velocity(initial)*time+1/2*acceleration*time^2
we know there is only velocity in the horizontal and none in the vertical so v initial in this case is 0, acceleration is gravity =9.81m/s^2
plug in .95=(1/2)*9.81*t^2 solve for t
t=.44seconds 
Now for part b we know there is no horizontal acceleration so distance= velcoity* time
we will use horrizontial velocity and the time we just found
distance= .8m/s*.44seconds
=.35 meters

Iwould have to say sorry i can't elaborate more. hope this though!