Posted by **Anonymous** on Sunday, March 14, 2010 at 8:49pm.

A baseball is thrown straight up from the rooftop 192 feet high. The function s(t)=16t^2+-64t+192 describes the ball's height above the ground,s(t), in feet, t seconds after it was thrown. How long will it take for the ball to hit the ground? Explain

- math -
**Reiny**, Sunday, March 14, 2010 at 11:53pm
Your equation does not make sense, things would be falling upwards

I think it should be

s(t) = -16t^2 + 64t + 192

we want 0 = -16t^2 + 64t + 192

t^2 - t - 12 = 0

(t-4)(t+3) = 0

t = 4 or t = -3 , but t > 0

so t = 4 seconds

## Answer this Question

## Related Questions

- math - An object that is falling or vertically projected into the air has it ...
- math - A person standing on the roof of a building throws a ball directly upward...
- math - a ball is thrown upward at 64 feet per second from the top of an 80 feet ...
- Algebra - THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the...
- Algebra - THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the...
- Math - Please help if you can. If a ball is shot projected straight upward at a ...
- College Algebra - Flight of a Ball If a ball is thrown upward at 96 feet per ...
- Math - A person standing close to the edge on the top of a 160-foot building ...
- Pre-Calculus - A ball is thrown vertically upward with an initial velocity of 64...
- Math- - A ball is thrown vertically upward with an initial velocity of 96 feet ...

More Related Questions