I need some help with this problem. Round to the nearest tenth, if necessary. A rock falls from atower that is 432 feet high. As it is falling, its height is givenby the formula h = 432 - 16t2. How many seconds will ittake for the rock to hit the ground (h=0)? Thank you for the help. I need some help with this problem. Round to the nearest tenth, if necessary. A rock falls from atower that is 432 feet high. As it is falling, its height is givenby the formula h = 432 - 16t2. How many seconds will ittake for the rock to hit the ground (h=0)? Thank you for the help.
Explanation / Answer
When the rock hit the ground h = 0 432 - 16t^2= 0 => 16t^2 = 432 => t^2 = 432/16 = 27 => t = 27 = 5.196 = 5.2 s