Graph the function over a one-period interval.y = - 
sin
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve the problem.An office contains 1000 ft3 of air initially free of carbon monoxide. Starting at time = 0, cigarette smoke containing 4% carbon monoxide is blown into the room at the rate of 0.5 ft3/min. A ceiling fan keeps the air in the room well circulated and the air leaves the room at the same rate of 0.5ft3/min. Find the time when the concentration of carbon monoxide reaches 0.01%.
A. 6.01 min B. 5.01 min C. 7.01 min D. 8.01 min
Mathematics
Find the volume.
A. 43.26 m3 B. 301.44 m3 C. 160.14 m3 D. 103.62 m3
Mathematics
Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Factor.xy + 10x - 6y - 60
A. (x - 10)(y + 6) B. (x + 10)(y - 6) C. (y - 10)(x + 6) D. (y + 10)(x - 6)
Mathematics