Solve.
-A window washer accidentally drops a bucket from the top of a 400-foot building. The height h of the bucket after t seconds is given by h = -16t2 + 400. When will the bucket hit the ground?
A) -5 sec
B) 80 sec
C) 5 sec
D) 25 sec

Question

Quizplus · Accepted Answer

The bucket hits the ground when $h = 0$. Setting the equation to 0 gives $0 = -16t^2 + 400$. Solving for $t$ gives $t = 5$ seconds.

Solve. -A Window Washer Accidentally Drops a Bucket from the Top