SOLUTION: The height h (in feet) of a kangaroo's jump can be modeled by h=-16t^2+18t where t is the time (in seconds) since the kangaroo jumped off of the ground. Find the zeros.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The height h (in feet) of a kangaroo's jump can be modeled by h=-16t^2+18t where t is the time (in seconds) since the kangaroo jumped off of the ground. Find the zeros.       Log On


   

Question 306986: The height h (in feet) of a kangaroo's jump can be modeled by h=-16t^2+18t where t is the time (in seconds) since the kangaroo jumped off of the ground. Find the zeros.
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Set h to zero and solve for t:
h=-16t^2+18t
0=-16t^2+18t
0=-8t^2+9t
0=t(-8t+9)
.
t = {0, 9/8)
That is h (height)is zero at times:
0 secs (at the beginning)
and again at
9/8 secs (or 1.125 secs)