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 128 ft/sec and the gorge is 192 ft deep, during what interval can the flare be seen? 
A. 6 sec < t < 10 sec
B. 4 sec < t < 8 sec
C. 0 sec < t < 2 sec
D. 2 sec < t < 6 sec
Answer: D
Mathematics
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A. 
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A. 
cis 20°, 
cis 140°, 
cis 260°
B. 
cis 20°, 
cis 140°, 
cis 260°
C. 
cis 30°, 
cis 150°, 
cis 270°
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cis 20°, 
cis 140°, 
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