Use the mileage chart shown below to find the minimum spanning tree for the 5 cities of Boston, Buffalo, Chicago, Columbus, and Louisville.
The length of the minimum spanning tree connecting the cities of Boston, Buffalo, Chicago, Columbus, and Louisville is
A. 1273 miles.
B. 1135 miles.
C. 2236 miles.
D. 1795 miles.
E. none of these
Answer: A
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Taylor used a regular hexagonal stock with a 2-in. distance across the flats to mill a new hexagonal rod as illustrated in the cross-section. Assume the vertices of the inside hexagon are the midpoints of the original hexagon's sides. What is the area milled off the original hexagon to create the new one?
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A. 
B. 
C. 
D. 
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