Choose the best answer.The mass of a bicycle helmet is about how much?
A. 271 milligrams
B. 271 metric tonnes
C. 271 kilograms
D. 271 grams
Answer: D
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Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (5x + 3)x
A. (5x + 3)x
B. (5x + 3)x
C. x ln (5x + 3)
D. ln (5x + 3) + 
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
Graph.(x - 1)2 + y2 = 16
A. 
B. 
C. 
D. 
Add.
A. 93 B. 82 C. 92 D. 91