document.write( "Question 1180303: A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Use the table below to find the percentage of the bulbs that can be expected to last less than 780 hours. \n" ); document.write( "
Algebra.Com's Answer #809929 by ikleyn(52778)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "How far below is the table you refer to ?\r
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