XPost: alt.usage.english   
   From: snidely.too@gmail.com   
      
   On Sunday, kami pointed out that ...   
   > On Sun, 22 Sep 2024 01:52:33 -0700, Snidely wrote:   
   >   
   >> Remember when kami bragged outrageously?  That was Sunday:   
   >>> On Thu, 19 Sep 2024 23:12:52 -0000 (UTC), Christian Weisgerber   
   >>> wrote:   
   >>>   
   >>>> I'm sorry, I don't know where to post this.  I'm crossposting to   
   >>>> alt.usage.english, because statute miles as a unit mostly afflict   
   >>>> the English-speaking world.   
   >>>>   
   >>>> So you want to convert between miles and kilometers.  The conversion   
   >>>> factor is... uh...  A 40-year-old calculator book provides a useful   
   >>>> tip:  Unless you're designing a space probe, you can use ln(5).   
   >>>>   
   >>>> WHAT?   
   >>>>   
   >>>> Yes, the natural logrithm of 5 approximates the conversion factor   
   >>>> between miles and kilometers; specifically one mile is about ln(5)   
   >>>> kilometers.  It's accurate to four digits.   
   >>>>   
   >>>> If nothing else, it's faster to type on a calculator.   
   >>>>   
   >>>> I think that's hysterical.   
   >>>   
   >>>   
   >>> simplest method is to multiply by 0.6   
   >>   
   >> There's no humor in that.   
   >>   
   >> -d   
   >   
   > an easier method would be, if the limit is 80 miles per hour,   
   > simply add half, which is 40 and then one tenth of that, which is   
   > 4 and multiply it by 2 which is 8, so 48 + 80 is 128 km/h   
   >   
   > similarly lets say 120 miles per hour, half 60, tenth times 2 is   
   > 12, so 72 + 120 = 192 km/h.   
      
   There's no humor in that.   
      
   -d   
      
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