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

Multiple Choice

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?
$$\text { (h } \left. = - 16 \mathrm { t } ^ { 2 } + \mathrm { v } _ { \mathrm { O } } \mathrm { t } + \mathrm { h } _ { \mathrm { O } } \right)$$

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