mrsaiellomath.weebly.commrsaiellomath.weebly.com/uploads/3/1/4/2/31426561/normal... · The lifespan...
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mrsaiellomath.weebly.commrsaiellomath.weebly.com/uploads/3/1/4/2/31426561/normal... · The lifespan of a 60-watt lightbulb produced by a company is normally distributed with a mean