Solve
-A Rock Falls from a Tower That Is $160 \mathrm { ft }$

question 179

Multiple Choice

Solve.
-A rock falls from a tower that is $160 \mathrm { ft }$ high. As it is falling, its height is given by the function $h ( t ) = 160 - 16 t ^ { 2 }$ . How many seconds will it take for the rock to hit the ground $( h = 0 )$ ?

• A) \(12.6 \mathrm { sec }\)
• B) \(1600 \mathrm { sec }\)
• C) \(10.2 \mathrm { sec }\)
• D) \(3.2 \mathrm { sec }\)

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