Natural Logarithm

So far the impression has been given that logarithmic representation of values are always given with a base of 10. Working with a base of 10 is intuitive to most people. For example, estimate log 450.

Since 100 < 450 < 1,000

10² < 10^x < 10³

then 2 < x < 3 … x=2.something

10^2.something= 450