Posted by **Erin** on Monday, October 17, 2011 at 4:52pm.

The height of a ball thrown vertically upward from a rooftop is modelled by h(t)=-5t^2=20t=50, where h(t) is the ball's height above the gorund,in meters, at time t seconds after the throw

a) determine the maximum height of the ball

b) how long does it take for the ball to reach its maximum height

c) how highis the rooftop

- Math( help please ! ) -
**Mike**, Monday, October 17, 2011 at 4:56pm
Read the problem carefully and if you still dont understand let me know :D

- Math( help please ! ) -
**Reiny**, Monday, October 17, 2011 at 6:11pm
Your equation makes no sense, make sure you read what you typed before posting.

## Answer This Question

## Related Questions

- Math( help please ! ) - The height of a ball thrown vertically upward from a ...
- math - the height of a ball thrown vertically upward from a rooftop is modelled ...
- college - A blue ball is thrown upward with an initial speed of 19.8 m/s, from ...
- math - An object that is falling or vertically projected into the air has it ...
- Math - The height(h) of an object that has been dropped or thrown in the air is...
- Math - The height(H) of an object that has been dropped or thrown in the air is ...
- Physics - A red ball is thrown down with an initial speed of 1.3 m/s from a ...
- physics - A red ball is thrown down with an initial speed of 1.2 m/s from a ...
- phy - A blue ball is thrown upward with an initial speed of 20.6 m/s, from a ...
- math - A person standing on the roof of a building throws a ball directly upward...

More Related Questions