document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1052747>Question 1052747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please assist with this question below:  thanks in advance<BR>\n" );
document.write( "The time spent talking on the telephone is normally distributed with a mean of 15 minutes and a standard deviation of 10 minutes.  Calls in the upper 5% incur an extra charge. What is the longest time a person can talk without incurring the extra charge? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #668137 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=668137\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  mean of 15 minutes and a standard deviation of 10 minutes<BR>\n" );
document.write( "the longest time a person can talk without incurring the extra charge?<BR>\n" );
document.write( "<= 95%<BR>\n" );
document.write( "invNorm(.95) = 1.645\r<BR>\n" );
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document.write( "0r\r<BR>\n" );
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document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=blue%28sigma%29%2Az+%2B+mu=blue+%28x%29 ALIGN=MIDDLE  ALT=\"blue%28sigma%29%2Az+%2B+mu=blue+%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "10*(1.645) + 15 = x = 31.45 (for these always  round up to next whole number)<BR>\n" );
document.write( "32min is the longest time a person can talk without incurring the extra charge </SPAN>\n" );
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