document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=168666>Question 168666</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Each month in UP. a year level generates an average of 28 lbs of paper trash for recycling. Assume the standard deviation is 21lbs. Assume the variable is approximately normally distributed. If a year level is selected at random find the percentage of generating:<BR>\n" );
document.write( "A. 0 between 27 and 31 lbs per month.<BR>\n" );
document.write( "B. More than 30.2 lbs per month. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #124321 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=124321\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Each month in UP. a year level generates an average of 28 lbs of paper trash for recycling. Assume the standard deviation is 21lbs. Assume the variable is approximately normally distributed. If a year level is selected at random find the percentage of generating:<BR>\n" );
document.write( "A. 0 between 27 and 31 lbs per month.<BR>\n" );
document.write( "z(27) = (27-28)/21 = -0.04762<BR>\n" );
document.write( "z(31) = (31-28)/21 = 0.14286<BR>\n" );
document.write( "P(27 < x < 31) = P(-0.04762 < z < 0.14286) = 0.07579<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "B. More than 30.2 lbs per month.<BR>\n" );
document.write( "z(30.2) = (30.2-28)/21 = 0.104762<BR>\n" );
document.write( "P(x > 30.2) = P(z > 0.104762) = 0.45828..<BR>\n" );
document.write( "=========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );