document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=83875>Question 83875</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0153155175/algebrahomeworkh>Harcourt Math</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I don't get how to find the area of a circle an d round to the nearest whole number. Will you please help me i will be having a quiz on it 5-31-07 and it is 5-30-07 so please please 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 #60342 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=60342\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The area of a circle is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2Ar%5E2 ALIGN=MIDDLE  ALT=\"pi%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "If you are tol to round your answer to the nearest whole <BR>\n" );
document.write( "number, then say your answer is 4.499. This is closer to 4<BR>\n" );
document.write( "than it is to 5, so your answer is 4. Say your answer is<BR>\n" );
document.write( "4.501. This is closer to 5 than to 4, so your answer is 5.<BR>\n" );
document.write( "You have to know what value to use for pi, too. It wmight make<BR>\n" );
document.write( "a difference in your answer. <BR>\n" );
document.write( "3.141 is 3-place accuracy<BR>\n" );
document.write( "3.1415 is 4-place accuracy<BR>\n" );
document.write( "3.14159 is 5-place accuracy<BR>\n" );
document.write( "You should be told how many decimal places to use on the quiz.<BR>\n" );
document.write( "Suppose the radius of a circle is a really big number.<BR>\n" );
document.write( "Suppose <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+5641896 ALIGN=MIDDLE  ALT=\"r+=+5641896\"   DISABLED_style= \"max-width:90%; height:auto;\" > inches, then<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A+=+pi%2A5641%5E2 ALIGN=MIDDLE  ALT=\"A+=+pi%2A5641%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Here, the fewer decimal places you use for pi, the more accuracy you're<BR>\n" );
document.write( "going to lose in your answer. I'll try examples, rounding to the nearest<BR>\n" );
document.write( "whole number<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B1%5D+=+3.141+%2A31820881 ALIGN=MIDDLE  ALT=\"A%5B1%5D+=+3.141+%2A31820881\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B1%5D+=+99949387 ALIGN=MIDDLE  ALT=\"A%5B1%5D+=+99949387\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B2%5D+=+3.1415+%2A+31820881 ALIGN=MIDDLE  ALT=\"A%5B2%5D+=+3.1415+%2A+31820881\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B2%5D+=+99965298 ALIGN=MIDDLE  ALT=\"A%5B2%5D+=+99965298\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I'm getting better and better accuracy with more accurate values of pi.<BR>\n" );
document.write( "This is only true because r is a large number. I need just as many decimal<BR>\n" );
document.write( "places for pi as there are digits in r. After that I won't get<BR>\n" );
document.write( "better accuracy rounded to the nearest whole number.<BR>\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );