Solve the problem.Two trains leave a train station at the same time. One travels east at 9 miles per hour. The other train travels west at 12 miles per hour. In how many hours will the two trains be 191.1 miles apart?
A. 9.6 hr
B. 9.1 hr
C. 18.2 hr
D. 4.6 hr
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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Solve the problem.A floodgate is in the shape of an isosceles trapezoid. Find the location of the centroid of the floodgate if the upper base is 34 m, the lower base is 18 m, and the height between bases is 10 m.
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