maths
posted by judith .
how long will it take a sum of money to tripe itself at (i) 9.5% compound interest and (ii) 9.5% simple interest?

3=1(1.095)^t
assuming compounding annually.
ln3=t*ln(1.095) solve for t.
ii) when does t*(1.095)=2 ? 
12.2
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