Solve the Problem $192 \mathrm { ft } / \mathrm { sec }$

Solve the problem.
-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 $192 \mathrm { ft } / \mathrm { sec }$ , and the gorge is $560 \mathrm { ft }$ deep, during what interval can the flare be seen?
$$\left( h = - 16 t ^ { 2 } + v _ { 0 } t + h _ { 0 } \right. \text { ) }$$

A) $15 < t < 17$
B) $10 < \mathrm { t } < 12$
C) $5 < t < 7$
D) $0 < t < 5$

Correct Answer:

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