document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1051302>Question 1051302</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At the beginning of an experiment, there are 400 grams of contaminants. Each hour, a fourth of the contaminants are filtered out. \r<BR>\n" );
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document.write( "A.Formulate a recursive sequence modeling the number of grams after n hours.<BR>\n" );
document.write( "B.Use the model to calculate the amount of contaminants after the third hour of the experiment. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #666829 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=666829\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  At the beginning of an experiment, there are 400 grams of contaminants. Each hour, a fourth of the contaminants are filtered out. <BR>\n" );
document.write( "A.Formulate a recursive sequence modeling the number of grams after n hours.<BR>\n" );
document.write( "a(n) = 0.75*a(n-1)<BR>\n" );
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document.write( "B.Use the model to calculate the amount of contaminants after the third hour of the experiment. <BR>\n" );
document.write( "Ans: 400 ; (3/4)400 = 300 ; (3/4)300 = 900/4  ; (3/4)900/4 = 2700/16 = 168.75g's<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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