CAN SOMEONE PLEASE HELP ME its way to confusing for me so i will give brainy and full stars to as long as its with both questions

Question 4.

A cannonball is shot from a cannon into the air from a height of 50m with an initial velocity of 75m and s. After how many seconds does the cannonball hit the ground?

CAN SOMEONE PLEASE HELP ME its way to confusing for me so i will give brainy and full stars to as long as its with both questions Question 4 A cannonball is sho class=