### BARS::Coconino County Road 3 Evaluates to 'e' and (61)

This road sign was found along Coconino County Road 3 in Arizona.

The sign says...

```   +----------------------+
| Stoneman Lk.Rd.    4 |
| Mormon Lake       12 |
| Flagstaff         40 |
+----------------------+
| 305 |
| <-- |
+-----+
```
```   the numbers are:  4  12  40  305

tan(305) = 0.271933

now the numbers are:  0.271933  4  12  40

0.271933 x (40 / sqrt(4 + 12))
0.271933 x (40 / sqrt(16))
0.271933 x (40 / 4)
0.271933 x 10 = 2.71933

2.71933 rounded to the nearest hundreth is 2.72
2.71933 truncated to the hundreths is 2.71

note:  e = 2.71828183
```
##### Almost Pi

This road sign almost equals Pi (3.14). The following is our first use of a trigonomic/hyperbolic function.

```   arctan(305) x sqrt(40 - 12 - factorial(4))
arctan(305) x sqrt(40 - 12 - 24)
arctan(305) x sqrt(4)
1.56751765  x 2 = 3.1350353

3.135 rounded to nearest hundreth is 3.14
3.135 truncated to the hundreths is 3.13
```

This road sign cannot be submitted to RoadSignMath.com as a Pi sign because the result must equal `3.14` when truncated to the hundreths.

##### RSeval: Road Sign Evaluation

This road sign, located along Coconino County Road 3 in Arizona, evaluates to 61.

```   the numbers are... 4  12  40  305

the math is...

305 / (40 / (12 - 4)) = 305 / (40 / 8) = 305 / 5 = 61
```

Note: The road sign used in this BAB was taken on the same roadtrip as the AZ Hwy-61 sign.

##### Updated::2009.05.11

This update did not result in the discovery of any new equations.

```
the numbers are... 4  12  40  305

observe...
sqrt(305 - 4 - 12) = sqrt(289) = 17
sqrt(305 + 4! - 40) = sqrt(289) = 17
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 18 March 2006 This work is licensed under a Creative Commons Attribution 3.0 United States License.