BARS::Triple Prime Road Sign On the Apache Trail in Arizona

This road sign is on the eastbound Apache Trail (AZ Hwy-88) in Arizona.

```   +----------------------+
| Tortilla Flat      2 |
| Apache Lake       17 |
| Roosevelt Lake    29 |
+----------------------+
```
```   the numbers are:  2  17  29

AllPrimesRS:  2, 17, 29 are all prime numbers

rsStateEval:  2 + 17 + 29 = 48
* Arizona was the 48th state admitted to the Union.

BARSfunc rsPiEval:  (sum_digits(29) * 2) / multi_digits(17) ~= Pi
* 22/7 approximates Pi rounded to nearest hundredth (3.14)
* sum_digits(n) = sum the digits of n
* domain:  n must be a prime number
* sum_digits(29) = 2+9 = 11
* mult_digits(n) = product of the digits of n
* domain:  n must be a prime number
* mult_digits(17) = 1*7 = 7

BARSfunc rsCardinalityEval:  mult_digits(29) - 17 + 2 = 3
* The road sign contains 3 numbers.

off-by-one rs42Eval:  2 * 29 - 17 = 42-1
* 42 is the "Answer to Life, the Universe, and Everything"
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 24 December 2011