Homework Help: algebra

Posted by Coach on Monday, May 7, 2012 at 11:44am.

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t–16t²

Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?

algebra - MathMate, Monday, May 7, 2012 at 9:24pm
On the ground, h(t)=0
h(t)=25t–16t²=t(25-16t)=0
Solve the values of t that make h(t)=0.

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