Thursday

July 31, 2014

July 31, 2014

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

- math -
**Reiny**, Sunday, March 14, 2010 at 11:53pmYour 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

**Related Questions**

math - An object that is falling or vertically projected into the air has it ...

Math - Please help if you can. If a ball is shot projected straight upward at a ...

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 ...

Math - A person standing close to the edge on the top of a 160-foot building ...

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 - A ball is tossed straight upward with an initial velocity of 80 ft per ...

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 ...