A rock is dropped from a bridge 320 feet above a river the pathway that the rock takes is 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 for the rock to reach the river, we need to set h (height) equal to 0 (since the river is at ground level) and solve for t (time):
0 = 16t + 320
-320 = 16t
t = -320/16
t = -20
Since time cannot be negative, we can disregard the negative sign and the rock will take 20 seconds to reach the river.
Therefore, the correct answer is not listed in the options provided.