document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=473725>Question 473725</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me!  This is really hard and I don't know how to do it.  Help would be MUCH appreciated!\r<BR>\n" );
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document.write( "\"Find the surface area of a sphere that has a diameter of 4 cm.\"/<BR>\n" );
document.write( "A.64&#960; cm2<BR>\n" );
document.write( "B. 32/3 pi cm^3.<BR>\n" );
document.write( "C. 4 pi cm^2<BR>\n" );
document.write( "D. 16 pi cm^2\"\r<BR>\n" );
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document.write( "THANK YOU!!!\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #324936 by </B><A HREF=/tutors/aboutme.mpl?userid=ccs2011><B>ccs2011(207)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ccs2011><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=ccs2011><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=324936\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Surface Area of sphere is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2Api%2Ar%5E2 ALIGN=MIDDLE  ALT=\"4%2Api%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Radius is exactly half the diameter.<BR>\n" );
document.write( "Given: diameter is 4 --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F2%29%2A4+=+2 ALIGN=MIDDLE  ALT=\"%281%2F2%29%2A4+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So the radius of the sphere is 2.<BR>\n" );
document.write( "Now substitute this value into general formula<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2Api%2A2%5E2+=+4%2Api%2A4+=+16%2Api ALIGN=MIDDLE  ALT=\"4%2Api%2A2%5E2+=+4%2Api%2A4+=+16%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Therefore, surface area is 16pi sq.cm. </SPAN>\n" );
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