A saddle point on the graph of z=x 2 ây 2 (in red). Saddle point between two hills (the intersection of the figure-eight-contour). In mathematics, a saddle point is a point in the domain of a function that is a stationary point but not a local extremum.
Hot food should be kept hot, at or above 140Â° F. 1  Wrap it well and place it in an insulated container until serving. 2  Just as with cold food - these foods should not sit out for more than 2 hours, or 1 hour in temperatures above 90Â° F. If food is left out longer, throw it away to be safe.
wtopstaff | November 14, 2014 9:00 am. Download audio. WASHINGTON â Power outages that last days mean you will probably need to throw out a lot of food in your refrigerator and freezer. Foods will stay safely cold 4 to 6 hours in your refrigerator. Hereâs the rule of thumb: If the temperature reaches above 40 degrees, throw out whatâs in your refrigerator and freezer. Your freezer will stay cold for two days if itâs full and one day if itâs half full.