Question 1103565
Substitute the given values any time you are ready.


Choose your base for the logarithm, but


{{{log((a))=log((P))+log(((1+r)^t))}}}

{{{log((a))-log((P))=t*log((1+r))}}}


{{{log((1+r))=(log((a))-log((P)))/t}}}
Not yet reached a formula for r, but you can find that easily from what value you find from {{{1+r}}}.


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{{{log((1+r))=(log((13824))-log((12696)))/2}}}

{{{log((1+r))=(4.140634-4.1037)/2}}}

{{{log((1+r))=0.01847}}}

{{{10^0.01847=r+1}}}

{{{r+1=1.0434}}}

{{{highlight(r=0.0434)}}}

rate is 4.3%