# If a stone is tossed from the top of a 270 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 270, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground?

##### 1 Answer

Jun 28, 2015

Solve

Discard the negative solution to get

#### Explanation:

The roots of

Discard the negative solution to get

The negative solution relates to a prequel to the story in which the stone is thrown up from the ground