how do you calculate log base 1.1 (1000) = ? on the calculator. the answer is 72.5, but I dont know how to get this answer.
Thanks Alan,
Or if you are using a different calculator you can use the change of base rule
$$log_{1.1} (1000) =\frac{log1000}{log1.1}$$
you can use any base you like :)
$${\frac{{log}_{10}\left({\mathtt{1\,000}}\right)}{{log}_{10}\left({\mathtt{1.1}}\right)}} = {\mathtt{72.476\: \!573\: \!784\: \!290\: \!347\: \!8}}$$