document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189194>Question 1189194</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A statistical analysis of  1,000 long-distance telephone calls made by a company indicates that the length of these calls is normally  distributed, with a mean of 270 seconds and a standard deviation of  30 seconds. What is the length of a call if only 1%  of all calls are  shorter? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820497 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=820497\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The z-value for 0.01 is -2.326<BR>\n" );
document.write( "z=(x-mean)/sd=(x-270)/30<BR>\n" );
document.write( "-69.8=x-270<BR>\n" );
document.write( "x=200.2 minutes </SPAN>\n" );
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