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Davis and his cabinet left the city by train that night, as government officials burned documents and departing Confederate troops burned tobacco and other warehouses to deny their contents to the victors. On April 2, 1865, General Godfrey Weitzel, commander of the 25th corps of the United States Colored Troops, accepted the city's surrender from the mayor and group of leading citizens who remained. The Union troops eventually managed to stop the raging fires but about 25% of the city's buildings were destroyed-

What percentage of Richmond was destroyed by fire after the Confederate evacuation?
Answer: 25
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Network hardware, software and specifications, as well as the expertise of network management personnel are important in ensuring that data follows the most efficient route, and upstream connections work reliably. A tradeoff between cost and efficiency is possible.[citation needed]

What sort of route does data follow? 
Answer: the most efficient route
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Solar power is the conversion of sunlight into electricity, either directly using photovoltaics (PV), or indirectly using concentrated solar power (CSP). CSP systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. PV converts light into electric current using the photoelectric effect.

What is the purpose of a concentrated solar power system?
Answer:
focus a large area of sunlight into a small beam