Mathematics, 29.11.2021 06:50 LindseyN1

Last year, wind turbines along a hilly ridge had an average output of 390 kilowatt hours per year. The turbines were upgraded, and now their average annual output is 30% more. What is the new average yearly output?

kilowatt hours=

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Last year, wind turbines along a hilly ridge had an average output of 390 kilowatt hours per year. T...