algebra
posted by Coach .
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?

On the ground, h(t)=0
h(t)=25t–16t²=t(2516t)=0
Solve the values of t that make h(t)=0.
Respond to this Question
Similar Questions

algebra
A ball is thrown into the air with an upward velocity of 28 ft/s. Its height (h) in feet after t seconds is given by the function h = –16t² + 28t + 7. How long does it take the ball to reach its maximum height? 
algebra
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 … 
math HELP
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 … 
math
a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = 16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? 
maath HELPPPP
a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = 16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? 
Algebra
A ball is thrown into the air with an upward velocity of 28 ft/s. Its height (h) in feet after t seconds is given by the function h = –16t² + 28t + 7. How long does it take the ball to reach its maximum height? 
Algebra
A ball is thrown into the air. The height h, in feet, of the ball can be modeled by the equation h= 16t^2+20t+6, where t is the time, in seconds, the ball is in the air. When will the ball hit the ground? 
Algebra
A ball is thrown into the air. The height in feet of the ball can be modeled by the equation h = 16t2 + 20t + 6 where t is the time in seconds, the ball is in the air. When will the ball hit the ground? 
Algebra
A ball is thrown into the air with an initial upward velocity of 45 ft/s. Its height (h) in feet after t seconds is given by the function h = –16t² + 45t + 6. After about how many seconds will the ball hit the ground? 
algebra
Ryan throws a tennis ball straight up into the air. The ball reaches its maximum height at 2 seconds. The approximate height of the ball x seconds after being thrown is shown in the table. Which equation models the motion of the ball?