document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=70041>Question 70041</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 years. The above formula for the United States then becomes<BR>\n" );
document.write( "P (in millions) = 250 x 2^(y-1990/66)<BR>\n" );
document.write( ":<BR>\n" );
document.write( "What will the population of the United States be in 2025 if this growth rate continues? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #49939 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=49939\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the average growth rate for the past 30 years gives a doubling time of 66 years. The above formula for the United States then becomes<BR>\n" );
document.write( "P (in millions) = 250 x 2^(y-1990/66)<BR>\n" );
document.write( ":<BR>\n" );
document.write( "What will the population of the United States be in 2025 if this growth rate continues?<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "P = 250 x 2^[(2025-1990)/66]<BR>\n" );
document.write( "P = 250 x 2^[35/66]<BR>\n" );
document.write( "P = 250 x 1.44423...<BR>\n" );
document.write( "P = 361.06 million people<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );