Question

The function y = –16t2 + 224 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

Answer: A)-3,-8 C)-6,-5/2 A)0.59,3.41 D)5,1 D)3.74

Explanation:

I took the test 11/5/18

Answer 2

we are given with the free-fall function expressed as y = –16t2 + 224. To get the time of fall, equate y equal to zero as this means the stone has already reached the bottom. Doing this, t is equal to square root of 14 or equivalent to 3.74 seconds