document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1157134>Question 1157134</A>: <I><SPAN STYLE=\"word-break: break-all;\"> this exercise uses the population growth model.\r<BR>\n" );
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document.write( "A certain species of bird was introduced in a certain county 25 years ago. Biologists observe that the population doubles every 10 years, and now the population is 19,000.<BR>\n" );
document.write( "(a) What was the initial size of the bird population? (Round your answer to the nearest whole number.)<BR>\n" );
document.write( " ______birds\r<BR>\n" );
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document.write( "(b) Estimate the bird population 7 years from now. (Round your answer to the nearest whole number.)<BR>\n" );
document.write( " __________birds </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #779952 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=779952\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A=Aob^x general form.<BR>\n" );
document.write( "A/Ao=2=(1+r)^10 years<BR>\n" );
document.write( "ln 2=10 ln (1+r)<BR>\n" );
document.write( "ln(1+r)=0.0693<BR>\n" );
document.write( "raise to e power<BR>\n" );
document.write( "1+r=1.071<BR>\n" );
document.write( "rate is 7.1% growth per year<BR>\n" );
document.write( "19000=Ao(1.071)^25<BR>\n" );
document.write( "19000=5.556Ao<BR>\n" );
document.write( "Ao=3419.92 or 3420\r<BR>\n" );
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document.write( "in 7 years 19000*1.071^7=30,710<BR>\n" );
document.write( "same for 34120*1.071^32<BR>\n" );
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