document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1180583>Question 1180583</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Evaluate the expression without using a calculator.\r<BR>\n" );
document.write( "\n" );
document.write( "log10 1000 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #810294 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><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=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=810294\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A log() is just an exponent.  It is the power that the base (10 in this case) needs to be raised to, to give you a number.  That is, if log10(y) = x  then  10^x = y.<br>\r<BR>\n" );
document.write( "\n" );
document.write( "So ask yourself:  10 raised to what power gives you 1000?   That power is your answer.   <br>\r<BR>\n" );
document.write( "\n" );
document.write( "Examples:<BR>\n" );
document.write( " log10(10) = 1, because 10^1 = 10<BR>\n" );
document.write( " log10(100) = 2, because 10^2 = 100<BR>\n" );
document.write( " log10(50) = 1.69897, because 10^1.69897 = 50   </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );