document.write( "Question 442452: I really need someone to show me how to do this difficult homework problem. It was solved previously but for 16 years, not ten. \r
\n" ); document.write( "\n" ); document.write( "Suppose the life of a certain brand of vacuum cleaner is normally distributed with a mean life of 12 years and a standard deviation of 4 years. A vacuum cleaner is randomly chosen.\r
\n" ); document.write( "\n" ); document.write( "7. Find the probability that it will last less than 10 years (4 digits after decimal point). \n" ); document.write( "

Algebra.Com's Answer #305207 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi, Note  'x-value'
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document.write( " *Note: 
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document.write( "     z = (10-12)/4 = -2/4 = -.5
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document.write( "  P(x < 10) = P(z < -.5) = .3085   |NORMSDIST(-.5)\r
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document.write( "ewatrrr@aol.com
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document.write( "private/pay tutoring Inquiries only, please. 
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