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Solve the Problem h=68.6−4.9t2h = 68.6 - 4.9 t ^ { 2 }

Question 440

Multiple Choice

Solve the problem.
-A rock falls from a tower that is 68.6 m high. As it is falling, its height is given by the formula h=68.6−4.9t2h = 68.6 - 4.9 t ^ { 2 } with t in seconds. How many seconds will it take for the rock to hit the ground (h =0) ?


A) 8 sec
B) 3.7 sec
C) 8.3 sec
D) 960.4 sec

Correct Answer:

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