Subtract.985 - 86
A. 899
B. 911
C. 889
D. 999
Answer: A
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. 7.01 min B. 6.01 min C. 8.01 min D. 5.01 min
Mathematics
Consider the functions f and g as shown in the graph. Answer the question.What is the value of (f + g)(3)?
A. 0 B. 1 C. 3 D. -1
Mathematics
Write the following as an algebraic expression in u, u > 0.sin 
A. 
B. u
C. 
D. 
Mathematics
Evaluate the sum.
A. 
B. 
C. 
D. 
Mathematics