document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1177203>Question 1177203</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The orbits of Earth and Venus around the Sun are almost circular, and in the same plane.<BR>\n" );
document.write( "Earth is 1.496* 10^8 km from the Sun.<BR>\n" );
document.write( "Venus is 1.082* 10^8 km from the Sun.<BR>\n" );
document.write( "Treating the space between the orbits as an annulus, calculate its area.<BR>\n" );
document.write( "Write your answer in scientific notation correct to 2 significant figures. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #805510 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=805510\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> assuming their orbits are circular, then you would use the area of a circle formula, which is:\r<BR>\n" );
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document.write( "A = pi * r ^2\r<BR>\n" );
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document.write( "pi represents the constant value of 3.142592654.....\r<BR>\n" );
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document.write( "the radius of the path of earth around the sun is equal to 1.496 * 10^8 kilometers.<BR>\n" );
document.write( "the radius of the path of venus around the sun is equal to 1.082 * 10^8 kilometers.\r<BR>\n" );
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document.write( "the sun is assumed to be the center of the circle that these two planets revolve around.\r<BR>\n" );
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document.write( "to find the area of the annulus, find the area of the circle made by the earth and subtract the area made by venus around the sun.<BR>\n" );
document.write( "what's left is the area between the earth and venus.\r<BR>\n" );
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document.write( "that's the annulus.\r<BR>\n" );
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document.write( "the area of the larger circle is equal to pi * (1.496 * 10^8)^2 = 7.030934624 * 10^16.\r<BR>\n" );
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document.write( "the area of the smaller circle is equal to pi * (1.082 * 10^8)^2 = 3.677937918 * 10^26.\r<BR>\n" );
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document.write( "the area of the annulus is the larger area minus the smaller area = 3.352996706 * 10^16.\r<BR>\n" );
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document.write( "here's a reference.\r<BR>\n" );
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document.write( "<a  rel=nofollow HREF= \"https://www.mathsisfun.com/geometry/annulus.html\" target = \"_blank\">https://www.mathsisfun.com/geometry/annulus.html</a>\r<BR>\n" );
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