Which two generalizations can be made based on what you know about cycles of matter in a closed system? New matter is added, and old matter is destroyed. Matter changes its physical form, allowing it to return to its original state. The amount of matter within the system remains the same. Matter and energy can cross the boundaries of the system. The cycle has a well-defined starting and stopping point.

Astore manager timed janette to see how long it would take her to fold and put away a sweater, a shirt, a pair of pants, and a scarf. it took her 26.1 seconds for the shirt, 24.3 seconds for the sweater, 32.8 seconds for the pants, and 18.2 seconds for the scarf. what was the average time it took janette to fold and put away all four items? during a catered lunch, an average of 4 cups of tea are poured per minute. the lunch will last 2 hours. how many gallons of tea should the caterer bring if there are 16 cups in one gallon?