Solve the problem.A railroad bridge is built over a V-shaped canyon. If the supports are 8 feet long at each end, the center support is 560 feet long, and the supports increase in length by 4 feet with each support (from 8 feet to 560 feet), what is the total length of all the supports?
A. 78,396 ft
B. 78,384 ft
C. 78,392 ft
D. 78,388 ft
Answer: C
Mathematics
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