3 days (before it gets soggy) depending on what kind it is.
If it's a hot day then no more than two hours, a little longer if it's cold.
Personally, I have always gone with 2 to 3 days opened, just to be sure.
This food will last only a day or two. Depending what it is made of and how it is stored. It should be stored in an air tight container.
You can't heat a sandwich in the refigerator you have to use an oven of some type.
2 days
1 year
If the sandwich has food on it that can spoil then it should be refrigerated. If it is refrigerated then it should be good. Some things like tuna salad sandwiches will make the bread soggy if left for too long.
This depends on how old your sandwich was when you bought it, whether or not it was refrigerated, and several other factors. When in doubt, don't eat it!
A foot long submarine sandwich is 0.000189393939 miles long.
3 to 4 days refrigerated
About four to five days, properly refrigerated.
about a week
Either in a container covered with a lid or plastic wrap, or in a sandwich bag.
It won't make a difference, it will just be colder, if pellet [not refrigerated] 24hours, if flakes [not refrigerated] 20mins.
You can keep brown eggs refrigerated for at least 2-4 days.
If you plan to use the leftovers, it should be refrigerated within 2 hours.
24 hours
This is some privates bullcrap, man! No sandwich is a foot!