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Posted by **Leyla** on Thursday, November 15, 2012 at 8:55pm.

- math -
**Leyla**, Thursday, November 15, 2012 at 9:10pmFormula: 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

- math -
**Reiny**, Thursday, November 15, 2012 at 9:39pmcorrect

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