### BARS::Castle Hot Springs Road in Arizona

This road sign is on Castle Hot Springs Road in Arizona. MathBabbler found this road sign while reading the Arizona Republic on 6 April 2013 and his picture of the road is a picture of a picture.

```   +-----------------------------+
| <- Castle Hot Springs Rd -> |
| <- State Route 74     16 Mi |
| <- Lake Pleasant      10 Mi |
| Morristown        21 Mi  -> |
+-----------------------------+
```
```   the numbers are:  74  16  10   21

rsPiEval:  (74 - 10 + sqrt(sqrt(16))) / 21 ~= Pi
* 66/21 approximates Pi rounded to nearest hundredth (3.14)
* 3.1415926535897932384626

rs37Eval:  21 % 10 * (74 / sqrt(sqrt(16))) = 37
* Why rs37Eval? 37 Heaven @ http://thirty-seven.org

rs42Eval:  log(74 + 16 + 10) * 21 = 42
* 42 is the "Answer to Life, the Universe, and Everything"

rs42Eval:  cuberoot(sqrt(74 - 10)) * 21 = 42
* 42 is the "Answer to Life, the Universe, and Everything"

number system rs42Eval:  74 - 2116 + log(10) = 42
* 42 is the "Answer to Life, the Universe, and Everything"

rsAgeEval:  74 - 21 + log(10) * sqrt(sqrt(16)) = 55
* MathBabbler was 55 years young when he created this BARS.

BARSfunc math:  reverse_digits(16 + 10 + 21) = 74
* reverse_digits(n) = the digits of n reversed
domain:  n must be a prime number
* 47 is prime; reverse_digits(16 + 10 + 21) = 74

off-by-one rsStateEval:  74 - 21 + 10 - 16 = 48-1
* Arizona was the 48th state admitted to the Union.
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 06 April 2013