The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulb

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answerhappygod
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The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulb

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The physical plant at the main campus of a large state
university recieves daily requests to replace florecent lightbulbs.
The distribution of the number of daily requests is bell-shaped and
has a mean of 57 and a standard deviation of 10. Using the
68-95-99.7 rule, what is the approximate percentage of lightbulb
replacement requests numbering between 57 and 77?
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