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  and the gorge is 560 ft deep, during what interval can the flare be seen?(h = -16t2 + vot + ho.)

A. 0 < t < 5
B. 15 < t < 17
C. 5 < t < 7
D. 10 < t < 12


Answer: C

Mathematics

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