document.write( "Question 532227: If the U.S. population is currently 312.6 million, how long will it take (in years) for the population to reach 400 million. Not sure how to compute.\r
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Algebra.Com's Answer #350731 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "You need to provide a population growth rate function. Without that, you cannot solve the problem.\r
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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