Find the sum of the geometric series.
Express the answer as a fraction.
A. 
B. 
C. 8857
D. 
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
Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (7x + 10)x
A. (7x + 10)x
B. ln (7x + 10) + 
C. (7x + 10)x
D. x ln (7x + 10)
Calculate the requested distance.The distance from the point S(-10, -2, -8) to the line x = -10 + 2t, y = 9 + 1t, 
A. 
B. 
C. 
D. 
Solve the problem.The parking lot at a medical center has 50 cars in it. 30% of the cars are two-toned. How many cars are two-toned?
A. 15 cars B. 167 cars C. 17 cars D. 150 cars