This road sign was found on northbound Loop 101 in Scottsdale, Arizona.

The road sign signs...

+---------------+ | Exit 40 | | Cactus Road | | 1/4 mile | ----------------- | Exit Only | +---------------+ note: / is used as a delimiter the numbers are: 1 4 40 the math is: log(40 / 4) = 1 observe... 40 / 4 = 10 log(n) defaults to log_{10}(n) without requiring a 10 log(10) outputs the power 10 is raised to to equal 10 10^1 = 10; therefore, log(10) = 1 complicating matters... I've seen the base-10 log function named log10(n)... log10(10) = 1This road sign cannot be submitted to RoadSignMath.com because it contains a fraction and slash is not a valid delimiter.

**Creator:** Gerald D. Thurman
[gthurman@gmail.com]

**Created:** 21 September 2006

This work is licensed under a Creative Commons License.