Question 1128161
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<pre>
2 = {{{(1+0.0515)^n}}} 


2 = {{{1.0515^n}}}


log(2) = n*log(1.0515)


n = {{{log((2))/log((1.0515))}}} = 13.8 years (approximately),  


    so the answer is that after 14 years the prices will be over than twice.
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