Question 1151357
In the year 2000, you can say {{{ t = 0 }}}
and {{{ N(0) = 10 }}} in millions
{{{ N(t) = N*e^(r*t) }}}
{{{ N(0) = N*e^(.012*0) }}}
{{{ 10 = N*e^0 }}}
{{{ N = 10 }}} at {{{ t=0 }}}
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{{{ 13 = 10*e^( .012*t ) }}}
{{{ e^( .012t ) = 1.3 }}}
{{{ .012t = ln( 1.3 ) }}}
{{{ .012t = .2624 }}}
{{{ t = 21.86 }}}
About 22 yrs have passed when population 
reaches 13 M