document.write( "Question 341784: use the exponential growth model A=A_0e^kt to show that the time it takes a population to double(to grow from A_0 to 2A_0) is given by t=ln2/k.
\n" ); document.write( "They do not give the rate of growth so I can not figure this out. Help PLEASE! \n" ); document.write( "

Algebra.Com's Answer #244751 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"A=A0%2Ae%5E%28kt%29\"$
\n" ); document.write( ".
\n" ); document.write( "Find $\"t\"$ when $\"A=2%2AA0\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"2A0=A0%2Ae%5E%28kt%29\"$
\n" ); document.write( " $\"2=e%5E%28kt%29\"$
\n" ); document.write( " $\"ln%282%29=kt\"$
\n" ); document.write( " $\"t=ln%282%29%2Fk\"$ \n" ); document.write( "

\n" );