document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1042236>Question 1042236</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose the number of symbols per minute a textbook typesetter can produce is given by <BR>\n" );
document.write( "p(t)= 250-120(2.8)^-.5t     where t is the number of months a typesetter has been in training.  \r<BR>\n" );
document.write( "\n" );
document.write( "find p(4) - we keep getting a negative number -36.85 why?  it even shows 4,-36.85 on the table on TI 83 Plus </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #657229 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=657229\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'll give it a try:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+p%28t%29+=+250+-+120%2A2.8%5E%28-5t%29+ ALIGN=MIDDLE  ALT=\"+p%28t%29+=+250+-+120%2A2.8%5E%28-5t%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+p%284%29+=+250+-+120%2A2.8%5E%28-.5%2A4%29+ ALIGN=MIDDLE  ALT=\"+p%284%29+=+250+-+120%2A2.8%5E%28-.5%2A4%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+p%284%29+=+250+-+120%2A2.8%5E%28-2%29+ ALIGN=MIDDLE  ALT=\"+p%284%29+=+250+-+120%2A2.8%5E%28-2%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+p%284%29+=+250+-+120%2A.12755+ ALIGN=MIDDLE  ALT=\"+p%284%29+=+250+-+120%2A.12755+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+p%284%29+=+250+-+15.306+ ALIGN=MIDDLE  ALT=\"+p%284%29+=+250+-+15.306+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+p%284%29+=+234.694+ ALIGN=MIDDLE  ALT=\"+p%284%29+=+234.694+\"   DISABLED_style= \"max-width:90%; height:auto;\" > symbols/min<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "Here's the plot:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+400%2C+400%2C+-10%2C+20%2C+-25%2C+300%2C+250+-+120%2A2.8%5E%28-.5x%29+%29+ ALIGN=MIDDLE  ALT=\"+graph%28+400%2C+400%2C+-10%2C+20%2C+-25%2C+300%2C+250+-+120%2A2.8%5E%28-.5x%29+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Not sure where your problem is.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+p%28t%29+ ALIGN=MIDDLE  ALT=\"+p%28t%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is positive for all <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+%3E=+0+ ALIGN=MIDDLE  ALT=\"+t+%3E=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Note that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2.8%5E%28-2%29+=+1+%2F+%28+2.8%5E2+%29+ ALIGN=MIDDLE  ALT=\"+2.8%5E%28-2%29+=+1+%2F+%28+2.8%5E2+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );