Solve the Problem $160 \mathrm { ft } / \mathrm { sec }$

question 475

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 $160 \mathrm { ft } / \mathrm { sec }$ , and the gorge is $384 \mathrm { ft }$ deep, during what interval can the flare be seen? $\left( h = - 16 \mathrm { t } ^ { 2 } + \mathrm { v } _ { 0 } \mathrm { t } + \mathrm { h } _ { 0 } \right.$ .)

• A) \(4 < \mathrm { t } < 6\)
• B) \(12 < t < 14\)
• C) \(8 < t < 10\)
• D) \(0 < \mathrm { t } < 4\)

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