Solve the problem.The distance traveled by an object moving in a straight line is given by s = t2 - 8t, where s is in feet and t is the time in seconds the object has been in motion. How long (to the nearest tenth) will it take the object to move 19 feet?
A. 20.9 sec
B. 9.7 sec
C. 20.0 sec
D. 9.9 sec
Answer: D
Mathematics
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, ? < ? < 
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, 
< ? < ?, find the exact value of cos (? + ?).
A. 
B. 
C. 
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and 
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