Question

The function y=-16t^2+384 models the height y in feet of a stone t seconds after it is dropped from the edge of a vertical cliff. How long will it take the stone to hit the ground? Round to the nearest hundredth of a second.

Answer 1

Plug in 0 for y and then solve for t

0=-16t^2+384

Answer 2

this is my answer 6.93 seconds is it correct?

Answer 3

I got 4.90...

Answer 4

16t^2=384
t^2=24
\[t=\sqrt{24}\]

Answer 5

oh i miscalculated. thank you

Answer 6

You're welcome