Question

What is x if `log(5x) = -3`?

Answer 1

`1/5000`

Explanation:

From the definition of logs,
`y=log_ax iff a^y=x`

we may write this equation as

`log_10 (5x)=-3 iff 10^(-3)=5x`

`therefore x=10^(-3)/5=1/5000`