Question

I know what the answer is to this but I can't figure out the steps, please help:
4=1.12^x
How do you get x?
(Answer x=12.2)

Answer 1

The operation that undoes exponential functions is taking the log of both sides. So:
\[\log_{1.12}4=x \] and plug that into a calculator. The log (base n) undoes the exponential n ^ x so you can get whatever x is.

Answer 2

thanks heaps :)