Posted by **lee** on Sunday, May 22, 2011 at 8:59pm.

If a ball is thrown upwards at 20 ft/sec, the height h after t seconds is given by h = -16t^2 + 20t.
How many seconds does it take for the ball to reach its maximum height, and what is this height?

## Answer This Question

## Related Questions

- algebra - ball is thrown upwards at 20 ft/sec, the height h after t seconds is ...
- math - A ball is thrown into the air with an upward velocity of 20 ft/s. Its ...
- Algebra 1 - a ball is thrown into the air with an upward velocity of 32 ft per ...
- Math - Please help ! 1.)a catapult launches a boulder with an upward velocity of...
- Math( help please ! ) - The height of a ball thrown vertically upward from a ...
- Math - With s(t) measured in feet and t in seconds, the equation s(t)= -16t^2...
- Algebra - The equation h= -16t^2 + 32t + 9 gives the height of a ball, h, in ...
- Algebra - The equation h = -16t^2 + 32t + 9 gives the height of a ball, h, in ...
- Pre-Calculus - 1. A projectile is fired straight up from a height of 6 feet. Its...
- math - A ball is thrown into the air with an upword velocity of 36 ft/s. Its ...

More Related Questions