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.
In general, you should always refrigerate perishable food within 2 hours (1 hour when the temperature is above 90 Â°F). When prepared food sits out at room temperature, any bacteria that is in/on your food is mutiplying, making it more likely that you could contract a foodborne illness.