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 ...
- algebra - A ball is thrown into the air with an upward velocity of 28 ft/s. Its ...
- Algebra - A ball is thrown into the air with an upward velocity of 28 ft/s. Its...
- Math - With s(t) measured in feet and t in seconds, the equation s(t)= -16t^2...
- Math( help please ! ) - The height of a ball thrown vertically upward from a ...
- Math( help please ! ) - The height of a ball thrown vertically upward from a ...
- Pre-Calc - ball thrown vertically upward with an initial velocity of 80 ft per ...
- Algebra - If a ball is thrown vertically upward from a height of 56ft. above ...