Solve.
-A window washer accidentally drops a bucket from the top of a 144-foot building. The height $h$ of the bucket after $\mathrm { t }$ seconds is given by $\mathrm { h } = - 16 \mathrm { t } ^ { 2 } + 144$. When will the bucket hit the ground?
A) $3 \mathrm { sec }$
B) $9 \mathrm { sec }$
C) $48 \mathrm { sec }$
D) $- 3 \mathrm { sec }$

Question

Quizplus · Accepted Answer

To find when the bucket hits the ground, set $h = 0$ and solve for $t$: $0 = -16t^2 + 144$. Dividing by -16, $t^2 = 9$, so $t = 3$ seconds (neglecting the negative root since time cannot be negative).

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

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-A Window Washer Accidentally Drops a Bucket from the Top