Answer:
Below
Step-by-step explanation:
Here is a way:
When the ball reaches its maximum height , it is 1/2 of the way back to your hand AND its velocity = 0 Find this time and double it to get to your hand.
Vf = vo - at
0 = 30 - 9.81(t) shows to to max height = 3.06 seconds
double it : = 6.12 seconds