document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=898386>Question 898386</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help with this log word problem?\r<BR>\n" );
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document.write( "The function P(x) = 90-25log base 2 raised to the x ,  models the percentage P(x) of students who would recall the important features of a classroom lecture as a function of of time where x represents the number of days that have elapsed since the lecture was given.  Let P(x) = 50 and solve for x.\r<BR>\n" );
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document.write( "After how many days do only half of the students recall the important features of the classroom lecture?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #544809 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=544809\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The function P(x) = 90-25log base2(x)  models the percentage P(x) of students who would recall the important features of a classroom lecture as a function of of time where x represents the number of days that have elapsed since the lecture was given.  Let P(x) = 50 and solve for x.<BR>\n" );
document.write( "After how many days do only half of the students recall the important features of the classroom lecture?<BR>\n" );
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document.write( "P(x) = 90-25log2(x) <BR>\n" );
document.write( "50 = 90-25log2(x)<BR>\n" );
document.write( "-25log2(x) = -40<BR>\n" );
document.write( "log2(x) = 8/5<BR>\n" );
document.write( "x = 2^(8/5)<BR>\n" );
document.write( "x = 3.03 days<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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