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In the early 1980s, wind-generated electricity cost about 30 cents per kilowatt
hour. Today, the best wind systems can produce electricity for 5 cents per
kilowatt hour. Find today's cost as a percent of the cost in the 1980s

 

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Preview: ... of 30 is 5/30 = x/100 c ...
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  • Posted on Jan. 26, 2012 at 11:14:40AM
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Preview: ... ent of ...
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