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 out how long it will take the rock to reach the river, we need to set the equation equal to 0 and solve for t:
h = 16t + 320
0 = 16t + 320
-320 = 16t
-320/16 = t
t = 20
Therefore, it will take the rock 20 seconds to reach the river. None of the given options match exactly, but the closest answer is B) 3.5 seconds.