document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1137235>Question 1137235</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this equation.\r<BR>\n" );
document.write( "\n" );
document.write( "according to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Supposed monthly household cell phone bills are normally distributed with a standard deviation of $11.\r<BR>\n" );
document.write( "\n" );
document.write( "a. what is the probability that a randomly selected monthly cell phone bill is less than $95?\r<BR>\n" );
document.write( "\n" );
document.write( "b. a. what is the probability that a randomly selected monthly cell phone bill is between 62 and $84? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #755096 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=755096\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "<(95-73)/11 or <2<BR>\n" );
document.write( "This probability is 0.9772.\r<BR>\n" );
document.write( "\n" );
document.write( "Between 62 and 84 is between z=-1 and z=+1<BR>\n" );
document.write( "This has probability 0.6827 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );