Solve the problem.One pump can drain a pool in 12 minutes. When a second pump is also used, the pool only takes 2 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in use?
A. 1
min
B. 
min
C. 14 min
D. 2
min
Answer: D
Mathematics
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Evaluate the integral by changing the order of integration in an appropriate way.
A. 
B. 
C. 
D. 
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A. 3 B. 3 ln e C. e3 D. 1
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