The first 2D Bar codes where used on Railroad Cars. Check the related link
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Rocks are related to math because of geology and in geology you use math.
it is related because a snowflake is a symmetrical shape
Bar code stores numbers only,but QR code can be store be with any multimedia.
bar modeling is math
The first 2D Bar codes where used on Railroad Cars. Check the related link
Bar code scanners use infrared rays to illuminate the bar code, which is then read by a sensor that detects the reflected light. X-rays are not typically used in bar code scanners due to safety concerns related to exposure to radiation. Instead, infrared rays are commonly used as they are safe and effective for reading bar codes.
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Rocks are related to math because of geology and in geology you use math.
The patterns they dance is related to math. How their body moves are related to math. How the brain signals our body to move is related to math. and... there are much more..
It is math related because the eclipse is science and the days are math because you have to count the days and math.
On units of 12
Presumably you're talking about a site where you can sell your old CD's. In which case 'Music Magpie' is one possibility. You type your bar-code, and it tells you what they think your CD is worth - See related link.
The level of measurement of a bar code is nominal.
"bar code" contains 7 letters.
Bar codes have a meaning because the meaning of a bar code is assigned to that bar code. A bar code identifies an item, and product information regarding that item is held in a data base.