document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=350743>Question 350743</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the domain of the function:<BR>\n" );
document.write( "f(x) = sqrt(13-x)\r<BR>\n" );
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document.write( "Answer choices: <BR>\n" );
document.write( "A. (negative infinity, 13) or (13, infinity)<BR>\n" );
document.write( "B. (sqrt(7) , infinity)<BR>\n" );
document.write( "C. (negative infinity, 13]<BR>\n" );
document.write( "D. (negative infinity, infinity)\r<BR>\n" );
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document.write( "*notice that C. has 13] we are using interval notation for this lesson which kind of confuses me.<BR>\n" );
document.write( "Thanks so much! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #250727 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=250727\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since you can't take the square root of a negative number, this means that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13-x%3E=0 ALIGN=MIDDLE  ALT=\"13-x%3E=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >. Solve for 'x' to get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%3C=13 ALIGN=MIDDLE  ALT=\"x%3C=13\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So the domain is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%3C=13 ALIGN=MIDDLE  ALT=\"x%3C=13\"   DISABLED_style= \"max-width:90%; height:auto;\" > which in interval notation is <font size=\"8\">(</font><IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \bf{-\infty,13}\"><font size=\"8\">]</font>\r<BR>\n" );
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document.write( "The basic idea with interval notation is that you're simply listing the boundaries of the set of numbers. In this case, the smallest number is negative infinity (ie there is no smallest number) and the largest number is 13 (and we're including 13)\r<BR>\n" );
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document.write( "If you need more help, email me at <a  rel=nofollow HREF=\"mailto:jim_thompson5910@hotmail.com?Subject=Algebra%20Help\">jim_thompson5910@hotmail.com</a>\r<BR>\n" );
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document.write( "Also, feel free to check out my <a  rel=nofollow HREF=\"http://www.freewebs.com/jimthompson5910/home.html\">tutoring website</a>\r<BR>\n" );
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document.write( "Jim </SPAN>\n" );
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