A Flare Fired from the Bottom of a Gorge Is $112 \mathrm { ft } / \mathrm { sec }$

question 400

Multiple Choice

A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of $112 \mathrm { ft } / \mathrm { sec }$ , and the gorge is $192 \mathrm { ft }$ deep, during what interval can the flare be seen?
$$\left( h = - 16 t ^ { 2 } + v _ { 0 } t + h _ { 0 } \right)$$

• A) \(9 < t < 10\)
• B) \(6 < t < 7\)
• C) \(3 < t < 4\)
• D) \(0 < t < 3\)

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