document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=939090>Question 939090</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Word problem: The electrical current in a circuit varies with time according to  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c=%283%28s%29%5E3-%28s%29%5E2%2B5%28s%29%29%2F%28%28s%29%5E3%2B10%29+ ALIGN=MIDDLE  ALT=\"+c=%283%28s%29%5E3-%28s%29%5E2%2B5%28s%29%29%2F%28%28s%29%5E3%2B10%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > where c is current, and s is time in seconds. Find the average rate of change from 0.75 to 1.5 seconds and find the instantaneous rate of change at 1.5 seconds. These are rational functions, please explain problem solving step by step as I cannot seem to get the answer correctly. Thank You! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #572164 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=572164\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c%28s%29+=%283%28s%29%5E3-%28s%29%5E2%2B5%28s%29%29%2F%28%28s%29%5E3%2B10%29+ ALIGN=MIDDLE  ALT=\"+c%28s%29+=%283%28s%29%5E3-%28s%29%5E2%2B5%28s%29%29%2F%28%28s%29%5E3%2B10%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "average rate of change from 0.75 to 1.5 seconds <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28c%281.5%29+-+c%28.75%29%29%2F%281.5-.75%29+=++%281.1495+-+.4273+%29%2F%281.5-.75%29+ ALIGN=MIDDLE  ALT=\"%28c%281.5%29+-+c%28.75%29%29%2F%281.5-.75%29+=++%281.1495+-+.4273+%29%2F%281.5-.75%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Re TY <BR>\n" );
document.write( "Used Graphing Calculator to Determine c(1.5) = 1.1495<BR>\n" );
document.write( "Note Below for c'(1.5)<BR>\n" );
document.write( ".... <BR>\n" );
document.write( "instantaneous rate of change at 1.5 seconds.<BR>\n" );
document.write( "c'(1.5)= 1.0834 <BR>\n" );
document.write( "...<BR>\n" );
document.write( "Recommend<BR>\n" );
document.write( "FREE graph software at:  https://www.padowan.dk/download/  </SPAN>\n" );
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