document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=714501>Question 714501</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The atmospheric pressure P in pounds per square inch (psi) is given by \r<BR>\n" );
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document.write( "P = 14.7 e&#8722;0.21 a<BR>\n" );
document.write( " where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.27 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the nearest foot.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #438818 by </B><A HREF=/tutors/aboutme.mpl?userid=kevwill><B>kevwill(135)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=kevwill><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=kevwill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=438818\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Starting with the original equation:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P+=+14.7e%5E%28-0.21a%29 ALIGN=MIDDLE  ALT=\"P+=+14.7e%5E%28-0.21a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Where P is the atmospheric pressure in PSI, and a is the altitude in miles.  We're given P and need to solve for a.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P+=+14.7e%5E%28-0.21a%29 ALIGN=MIDDLE  ALT=\"P+=+14.7e%5E%28-0.21a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P%2F14.7+=+e%5E%28-0.21a%29 ALIGN=MIDDLE  ALT=\"P%2F14.7+=+e%5E%28-0.21a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28P%2F14.7%29+=+ln%28e%5E%28-0.21a%29%29 ALIGN=MIDDLE  ALT=\"ln%28P%2F14.7%29+=+ln%28e%5E%28-0.21a%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28P%2F14.7%29+=+-0.21a ALIGN=MIDDLE  ALT=\"ln%28P%2F14.7%29+=+-0.21a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28P%2F14.7%29%2F-0.21+=+a ALIGN=MIDDLE  ALT=\"ln%28P%2F14.7%29%2F-0.21+=+a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "So for P = 11.27 PSI, <BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+ln%2811.27%2F14.7%29%2F-0.21 ALIGN=MIDDLE  ALT=\"a+=+ln%2811.27%2F14.7%29%2F-0.21\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+ln%280.766667%29%2F-0.21 ALIGN=MIDDLE  ALT=\"a+=+ln%280.766667%29%2F-0.21\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+%28-0.265703%29%2F%28-0.21%29 ALIGN=MIDDLE  ALT=\"a+=+%28-0.265703%29%2F%28-0.21%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+1.265253 ALIGN=MIDDLE  ALT=\"a+=+1.265253\"   DISABLED_style= \"max-width:90%; height:auto;\" > miles or 6681 feet.\r<BR>\n" );
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