Aperson kicks a ball from the ground into the air with an initial upward velocity of 8 feet per second. what is the maximum height of the ball? when will the ball hit the ground?

Chech the picture below.

if the person kicked it from the ground, that means its initial height is 0.

it reaches its maximum height at the y-coordinate of its vertex, and it will hit the ground when y = 0, as you see in the picture.



now let's find the y-coordinate of its vertex



when will it hit the ground?