document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=445402>Question 445402</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this homework problem. The previous answer (.1057) was incorrect.\r<BR>\n" );
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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.<BR>\n" );
document.write( "7. Find the probability that it will last less than 10 years (4 digits after decimal point). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #306808 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=306808\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  <PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\"><font face = \"Tohoma\" size = 4 color = \"indigo\"><b> <BR>\n" );
document.write( "Hi<BR>\n" );
document.write( " z = (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2810%29 ALIGN=MIDDLE  ALT=\"highlight%2810%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >-12)/4 = .5   P(z< .5) = .3085 </SPAN>\n" );
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