Solve the Rational Inequality $208 \mathrm { ft } / \mathrm { sec }$

Solve the rational inequality. Write the solution set in interval notation.
-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 $208 \mathrm { ft } / \mathrm { sec }$ , and the gorge is $672 \mathrm { ft }$ deep, during what interval can the flare be seen? $\left( h = - 16 t ^ { 2 } + v _ { 0 } t + h _ { 0 } \right)$

A) $6 < t < 7$
B) $0 < t < 6$
C) $12 < t < 13$
D) $18 < \mathrm { t } < 19$

Correct Answer:

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