A rock is dropped from a bridge 320 feet above a river the pathway that the rock takes can be modeled by the equation h=-16t+320 how long will it take the rock to reach the river
A 2.5 second's
B 3.5 seconds
C 3.8 seconds
D 4.5 seconds
To find the time it will take for the rock to reach the river, we need to solve for when h = 0. This represents when the rock will be at the level of the river.
h = -16t + 320
0 = -16t + 320
16t = 320
t = 320/16
t = 20
So, it will take 20 seconds for the rock to reach the river. But in the given options, the closest answer is B) 3.5 seconds. The correct answer should be C) 3.8 seconds.