Question

The function above 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

≈ 3.74 seconds

Explanation:

Oops! The numbers I had to work with were "The function y = –16t2 + 224..."

Answer 2

3.94 seconds

Explanation:

h = - 16t² + 248

If stone is dropped, then h = 0

- 16t² + 248 = 0

t² =
`(248)/(16)`

t = ±
`(2√(62) )/(4)`

t < 0 is a solution of equation, but not a solution of the task

t =
`(2√(62) )/(4)` ≈ 3.94 seconds