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

question 48

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) \(0 < t < 5\)

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