SOLUTION: A ball thrown vertically into the air has its height above ground given by h=-16t^2+112t, where t is in seconds and s is in feet. When will the ball hit the ground?

Question 711590: A ball thrown vertically into the air has its height above ground given by h=-16t^2+112t, where t is in seconds and s is in feet. When will the ball hit the ground?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
A ball thrown vertically into the air has its height above ground given by h=-16t^2+112t, where t is in seconds and s is in feet. When will the ball hit the ground?
When the ball is on the ground, the height (h) is zero. So, set h to zero and solve for t:
h=-16t^2+112t
0=-16t^2+112t
0=16t^2-112t
0=t^2-7t
0=t(t-7)
.
t = {0, 7}
Throw out the 0 (start) leaving:
t = 7 seconds

RELATED QUESTIONS
A ball is thrown into the air vertically with a velocity of 112 feet per second. The ball (answered by Alan3354)

Suppose a ball thrown into the air has its height (in feet) given by the function h(t) (answered by solver91311)

The height (t) in feet above the ground, of a ball thrown into the air from the top of a... (answered by Alan3354)

Problem: The height (H) of the ball thrown into the air with an initial velocity of 9.8... (answered by ikleyn)

The Height in feet of a baseball above ground is given by h(t)=-16t^2+32t+3 where t... (answered by scott8148,ankor@dixie-net.com)

Doug throws a ball vertically into the air while standing on a platform that is 10 feet... (answered by Boreal)

A ball is thrown into the air with an initial upward velocity of 45 ft/s. Its height (h)... (answered by Alan3354)

Can you please help my in How to solve quadratic function word problems my question is... (answered by nerdybill)

A ball is thrown into the air. The path of the ball is given by the quadratic formula h... (answered by rothauserc)