Hi,





x/100 =  = log(2)/log(5)

     x = 100log(2)/log(5) = 43.07 

Answer by solver91311(24713)   (Show Source): You can put this solution on YOUR website!
 











Take the log of both sides.  Choice of base depends on whether:





1) you want an exact answer or if you have a calculating device that can give you a log value to any base you choose in which case choose base 5





2) you definitely want a numeric approximation and you only have tables or a calculating device that gives you base 10 or base e logs in which case choose base 10 or e.











Use 





to write











Solve for 











Like I said, use any base you like, but if you just want to render the exact answer use base 5 because , so the expression would reduce to:













John



My calculator said it, I believe it, that settles it



 

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