document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1160736>Question 1160736</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 1800 miles. What is the probability a certain tire of this brand will last between 56,220 miles and 56,760 miles?<BR>\n" );
document.write( "		0.4920<BR>\n" );
document.write( "		0.4649<BR>\n" );
document.write( "		0.9813<BR>\n" );
document.write( "		0.0180<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #784158 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=784158\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "this is between -3780/1800 or -2.1<BR>\n" );
document.write( "and -3240/1800 or -1.8<BR>\n" );
document.write( "That probability of z between those two values is 0.01807<BR>\n" );
document.write( "last choice Is the best. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );