Posted by Leyla on Thursday, November 15, 2012 at 8:55pm.
Formula: A(t)=Pe^rt
A=3*300=900
r=3.5%=0.035
P=300
=> 900=300e^0.035t
=>3=e^0.035t
=>ln3=lne^0.035t
=>1.09=0.035t
=>t=1.09/0.035=31 yeears
correct
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