document.write( "Question 609895: (1) if light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviatin of 500 hurs, what percentage of light bulobs have a life less than 2500 hours?\r
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Algebra.Com's Answer #384016 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours
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document.write( "what percentage of light bulbs have a life less than 2500 hours(the mean)? 50%
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