Determine the quadrant containing ?.sin ? < 0 and sec ? > 0
A. I
B. II
C. III
D. IV
Answer: D
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Solve the problem. Round to tenths where necessary.S(x) = -x3 + 3x2 + 189x + 1200, 2 ? x ? 9 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon.
A. 9°C B. 2°C C. 3°C D. 8°C
Express the number as the ratio of two integers.0.77777 . . .
A. 
B. 
C. 
D. 
Solve the problem.Working together, Rick and Juanita can complete a job in 6 hours. It would take Rick 9 hours longer than Juanita to do the job alone. How long would it take Juanita alone?
A. 15 hr B. 6 hr C. 3 hr D. 9 hr
A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last the specified period of time.Less than 690 hours
A. 4857 B. 4853 C. 4860 D. 2357