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Old 10-03-2012, 06:41 PM
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Nordic_Kat Nordic_Kat is offline
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Location: Texas
Join Date: Aug 2009
Posts: 7,613
Mein Auto: 2009 328i E93 MT
Originally Posted by pointandgo View Post
I'm wondering if the BMW "asterisk" calculates that the temperature is declining when the symbol appears and chime goes off. Last time that I checked, ice doesn't form at 38 deg. F.
My guess is any engineer who works at the FIZ and has been caught on some of the roads in southern Germany and northern Austria has figured out that if he can get the chains on his tires before temps reach 0C, it's much easier and a lot less wear and tear on the knuckles.

It's a word problem:

It takes Franz 7 minutes per wheel to put the chains on his E92. If the temperature is dropping at 0.12 degrees per minute, at what temperature must Franz begin installing chains to get them on the car before the temperature reaches 0C?
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