Houston Chronicle: Conversion From Minutes & Seconds to a Decimal in Excel
5 mins" would be appropriate unless you are expressing it as an adjective then use the singular form, as in a five minute break or the ten minute mark. However, in scientific writing, the abbreviation for the units is always in the singular form – 5min, 5km, 5kg. It might therefore not be considered wrong to use singular forms of abbreviations with plural numbers.
Min means Minimum. So yes, it's a function that, taken two elements, gives you the minimum of those.
The SEC has narrowed its focus to two scheduling models for football, and leadership is leaning toward a nine-game format. Meanwhile, the conference has a playoff idea filed away for emergency use, ...