document.write( "Question 236129: How long will it take for the population of a certain country to double if its annual growth rate is 3.5%? (Round to the nearest year.) \n" );
document.write( "Use the exponential growth model P(t) = P0ekt. \n" );
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document.write( " ___ 1 year \n" );
document.write( " ___ 9 years \n" );
document.write( " ___ 57 years \n" );
document.write( " ___ 20 years \n" );
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