document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=716431>Question 716431</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The atmospheric pressure P in pounds per square inch (psi) is given by <BR>\n" );
document.write( "P = 14.7 e&#8722;0.21 awhere a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.21 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 #440145 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=440145\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The atmospheric pressure P in pounds per square inch (psi) is given by <BR>\n" );
document.write( "P = 14.7 (e&#8722;0.21 a)  where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.21 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the nearest foot.)<BR>\n" );
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document.write( "11.21 = 14.7*e^-0.21a<BR>\n" );
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document.write( "e^(-0.21a) = 0.7626<BR>\n" );
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document.write( "Take the natural log of both sides to get:<BR>\n" );
document.write( "-0.21a = -0.2710<BR>\n" );
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document.write( "a = 1.2906 miles<BR>\n" );
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document.write( "a = 1.2906*5280 = 6814 feet<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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