If a ball is dropped from a height of h feet it takes t seconds to hit the ground which is modeled by the equation . How long will it take the ball to hit the ground when it is dropped from 130 feet? Round to two decimal places if necessary.
A) 2.80 sec
B) 0.71 sec
C) 2.85 sec
D) 8.125 sec

Question

If a ball is dropped from a height of h feet it takes t seconds to hit the ground which is modeled by the equation  . How long will it take the ball to hit the ground when it is dropped from 130 feet? Round to two decimal places if necessary.
A) 2.80 sec 
B) 0.71 sec 
C) 2.85 sec 
D) 8.125 sec

Quizplus · Accepted Answer

Substitute h = 130 into the given equation
130 = 16t^2
Solve for t using the square root property
t = sqrt(130/16) = 2.85 (rounded to two decimal places) 
Therefore, the ball will take 2.85 seconds to hit the ground when dropped from 130 feet. The answer is choice C.

If a Ball Is Dropped from a Height of H