document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=212859>Question 212859</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Problems A-C are complete, I need help with d and e. Please.<BR>\n" );
document.write( "Students in an english class took a final exam. They took equivalent forms of the exam at monthly intervals thereafter. The average score S(t), in percent, after t months was found to be given by S(t)=68-20log(t+1), t> or = to 0.<BR>\n" );
document.write( "a)What was the average score when they initially took the test, t=0?<BR>\n" );
document.write( "68%<BR>\n" );
document.write( "b)What was the average score after 4 months? 54% And after 24months? 40%<BR>\n" );
document.write( "c)After what time t was the average score 50%? 6.9 months\r<BR>\n" );
document.write( "\n" );
document.write( "d) What upper limit might be placed on t?<BR>\n" );
document.write( "e) In practice, would this upper limit ever be enforced? Why? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #160962 by </B><A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><B>Edwin McCravy(20056)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><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=Edwin+McCravy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=160962\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Problems A-C are complete, I need help with d and e. Please.<BR>\n" );
document.write( "Students in an english class took a final exam. They took equivalent forms of the exam at monthly intervals thereafter. The average score S(t), in percent, after t months was found to be given by S(t)=68-20log(t+1), t> or = to 0.<BR>\n" );
document.write( "a) What was the average score when they initially took the test, t=0? 68%<BR>\n" );
document.write( "b) What was the average score after 4 months? 54% And after 24months? 40%<BR>\n" );
document.write( "c) After what time t was the average score 50%? 6.9 months <BR>\n" );
document.write( "d) What upper limit might be placed on t?<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\"><font size = 4 color = \"indigo\"><b>\r\n" );
document.write( "(This tests how much knowledge people forget after they finish \r\n" );
document.write( "taking a class.)\r\n" );
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document.write( "68% because the \"-20log(t+1)\" is always subtracted from 68\r\n" );
document.write( "and the percentage would be 68% only at the beginning and\r\n" );
document.write( "decrease from there. \r\n" );
document.write( "</PRE></font></b><BR>\n" );
document.write( "e) In practice, would this upper limit ever be enforced? Why?<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\"><font size = 4 color = \"indigo\"><b>\r\n" );
document.write( "Enforced?  That doesn't make any sense!  You can't \"enforce\" \r\n" );
document.write( "somebody to make a certain grade on a exam in a course they \r\n" );
document.write( "completed t months ago. What do they do?  Lose credit for\r\n" );
document.write( "taking the course if they don't remember enough of it to pass\r\n" );
document.write( "an exam on it  after so many months and make them take the\r\n" );
document.write( "course over?  I don't get it. Sorry. \r\n" );
document.write( "\r\n" );
document.write( "Edwin</PRE>   </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );