document.write( "Question 70041: 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
\n" ); document.write( "P (in millions) = 250 x 2^(y-1990/66)
\n" ); document.write( ":
\n" ); document.write( "What will the population of the United States be in 2025 if this growth rate continues? \n" ); document.write( "
Algebra.Com's Answer #49940 by ankor@dixie-net.com(22740)\"\" \"About 
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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
\n" ); document.write( "P (in millions) = 250 x 2^(y-1990/66)
\n" ); document.write( ":
\n" ); document.write( "What will the population of the United States be in 2025 if this growth rate continues?
\n" ); document.write( "Replace y with 2025 in the above equation
\n" ); document.write( ":
\n" ); document.write( "P (in millions) = 250 x 2^(2025-1990/66)
\n" ); document.write( ":
\n" ); document.write( "P (in millions) = 250 x 2^(35/66)
\n" ); document.write( ":
\n" ); document.write( "P (in millions) = 250 x 2^.53
\n" ); document.write( ":
\n" ); document.write( "P (in millions) = 250 x 1.443929
\n" ); document.write( ":
\n" ); document.write( "P (in millions) = 360.98 \n" ); document.write( "
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