SOLUTION: A bullet is fired into the air with an intial upward velocity of 80ft per second from the top of a building 96ft high. The equation that gives the height of the bullet at any time

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A bullet is fired into the air with an intial upward velocity of 80ft per second from the top of a building 96ft high. The equation that gives the height of the bullet at any time       Log On


   

Question 777194: A bullet is fired into the air with an intial upward velocity of 80ft per second from the top of a building 96ft high. The equation that gives the height of the bullet at any time t is h= 96+80t-16t^2 (<---thats 16 t squared) At what times will the bullet be 192 feet in the air?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
A bullet is fired into the air with an intial upward velocity of 80ft per second from the top of a building 96ft high. The equation that gives the height of the bullet at any time t is h= 96+80t-16t^2 (<---thats 16 t squared) At what times will the bullet be 192 feet in the air?
***
h= 96+80t-16t^2
-16t^2+80t+96=192
-16t^2+80t-96=0
-t^2+5t-6=0
(-t+3)(t-2)=0
t=2
or
t=3
The bullet be 192 feet in the air:
after 2 sec on the way up
after 3 sec on the way down