document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=979142>Question 979142</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A grain of sand is placed on the first square of a chessboard, two grains on the second square, four grains on the third, eight on the fourth, and so on. Without a calculator, use scientific notation to approximate the number of grains of sand required for the 64th square. (Hint: Use the fact that 2^10 &#8776; 10^3.)\r<BR>\n" );
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document.write( "I got 9.2 x 10^18. The books answer was 8 x 10^18. I used the calculator for this problem. If I'm wrong, please help me. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #600437 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=600437\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "you got it right\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E0+=+1 ALIGN=MIDDLE  ALT=\"2%5E0+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" > grain on the first square<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E1+=+2 ALIGN=MIDDLE  ALT=\"2%5E1+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" > on the second square<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E2+=+4 ALIGN=MIDDLE  ALT=\"2%5E2+=+4\"   DISABLED_style= \"max-width:90%; height:auto;\" > on the third square<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E3+=+8 ALIGN=MIDDLE  ALT=\"2%5E3+=+8\"   DISABLED_style= \"max-width:90%; height:auto;\" > on the fourth square<BR>\n" );
document.write( "...<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E63 ALIGN=MIDDLE  ALT=\"2%5E63\"   DISABLED_style= \"max-width:90%; height:auto;\" > on the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=64th ALIGN=MIDDLE  ALT=\"64th\"   DISABLED_style= \"max-width:90%; height:auto;\" > square<BR>\n" );
document.write( "(exponent is always one less than the # of square <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" > to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=64 ALIGN=MIDDLE  ALT=\"64\"   DISABLED_style= \"max-width:90%; height:auto;\" >)\r<BR>\n" );
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document.write( "Answer is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E63=9.223372036854775808%2A10%5E18=9.2%2A10%5E18 ALIGN=MIDDLE  ALT=\"2%5E63=9.223372036854775808%2A10%5E18=9.2%2A10%5E18\"   DISABLED_style= \"max-width:90%; height:auto;\" > grains of sand on the 64th square.\r<BR>\n" );
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document.write( "Note: Do not subtract <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E63 ALIGN=MIDDLE  ALT=\"2%5E63\"   DISABLED_style= \"max-width:90%; height:auto;\" > is not the same as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%5E%2864-+1%29 ALIGN=MIDDLE  ALT=\"2%5E%2864-+1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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