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The life of a fully charged cell phone battery is normally distributed with a mean of 12 hours and a standard deviation of half an hour. What percent of batteries last less than 11 hours?

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The life of a fully charged cell phone battery is normally distributed with a mean of 12 hours and a standard deviation of half an hour. What percent of batteries last less than 11 hours? ​

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Another question on Mathematics

The life of a fully charged cell phone battery is normally distributed with a mean of 12 hours and a standard deviation of half an hour. What percent of batteries last less than 11 hours?