Saturday

January 31, 2015

January 31, 2015

Posted by **miguel** on Tuesday, August 6, 2013 at 11:17pm.

- math -
**Reiny**, Wednesday, August 7, 2013 at 12:32amwhen it hits the ground, h = 0

so solve:

16t^2 - 32t - 240 = 0

t^2 - 2t - 15 = 0

(t-5)(t+3) = 0

t = 5 or t = -3, which is not acceptable

it will hit the ground after 5 seconds

**Answer this Question**

**Related Questions**

Calculus - A ball is thrown straight down from the top of a 220-foot building ...

Math - A ball is thrown downward from the top of a 100-foot building with an ...

math - an object is thrown upward from the top of a 80-foot building with a ...

Math - An object is thrown from the top of an 80 foot building with an initial ...

English - 1. Kate is listening to music with headsets on a smart phone. 2. Kate ...

English - 1. He is playing a game with his smart phone. 2. He is talking on the ...

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 - Mariano is standing at the top of a hill when he kicks a soccer ball into...

Calculus - A ball is thrown upward with an initial velocity of 96 feet per ...