Complete.225.7 hm = 
km
A. 2.257
B. 22,570
C. 2257
D. 22.57
Answer: D
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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
Evaluate the double integral.
dx dy
A. 
ln 2 - 
ex2 - 
B. 
(ln 2)2 + 
C. 
ln 2 + 
D. 
ln 2 - e2 ln 2 - 
Evaluate the radical expression if it is a real number. Use a calculator to approximate irrational numbers to the nearest hundredth. If the expression is not a real number, so state.
A. 2 B. -32 C. -2 D. not a real number
Find the missing coordinate to complete the ordered pair.y = 3x - 10
(-4, )
A. (-4, -12) B. (-4, -2) C. (-4, -22) D. (-4, 2)