BARS::Not Quite e -- Off By 0.01

[14,16,23,387]
               387                387         387
      ---------------------  =  --------  =  -----  =  2.7253
      summation(16,23) - 14     156 - 14      142

      summation(16,23) = 16+17+18+19+20+21+22+23 = 156

2.7253 rounded to the nearest hundredth is 2.73, but 2.7253 rounded to the hundredths is 2.72.

RoadSignMath.com uses the value of e rounded to the hundredths (i.e. 2.71).

The value of e evaluates to 2.71828183..., which is 2.72 when rounded to the nearest hundredth.

Let's get a better approximation of how far from e our result is.

   foo = 2.72535211267605633802816901408
   e   = 2.71828182845904523536028747135

   foo - e = .00707028421701110266788154273

   foo - e rounded to the hundredths gives .00
   foo - e rounded to the nearest hundredths gives 0.01

   foo is 0.26% greater than e

The mathmetical constant e is sometimes called either Euler's number or Napier's constant.


Creator: Gerald D. Thurman [gthurman@gmail.com]
Created: 19 January 2006

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This work is licensed under a Creative Commons License.
RoadHacker Nanofoo

Arizona had a rainy spring of 2005 and that turned AZ Hwy-387 into a six mile scenic drive.

RoadHacker:: Arizona Highway 387 During Spring 2005 [opens new window]