document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=145962>Question 145962</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In order to achieve maximum results from aerobic exercise, one should maintain one's heart rat at a certain level.  A 45 year old woman with a resting heart rate of 80 beats per minute, should keep her heart rate between 137 and 156 beats per minute while exercising.  She checks her pulse for 10 sec while exercising. What should the number of beats be?<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 #106521 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=106521\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x= number of beats per minute\r<BR>\n" );
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document.write( "Since the number of beats per minute (bpm) should be within 137 and 156 , this means that we have the given inequality\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=137%3C+x+%3C156 ALIGN=MIDDLE  ALT=\"137%3C+x+%3C156\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "But since we only want to know the bpm in 10 seconds, we need to divide everything by 6 (since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%2F6=10 ALIGN=MIDDLE  ALT=\"60%2F6=10\"   DISABLED_style= \"max-width:90%; height:auto;\" >)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=137%2F6%3C+x+%2F6%3C156%2F6 ALIGN=MIDDLE  ALT=\"137%2F6%3C+x+%2F6%3C156%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=22.833%3C+x+%2F6%3C26 ALIGN=MIDDLE  ALT=\"22.833%3C+x+%2F6%3C26\"   DISABLED_style= \"max-width:90%; height:auto;\" > Simplify\r<BR>\n" );
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document.write( "So in 10 seconds, she should be between 23 and 26 bpm\r<BR>\n" );
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