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Arandom number generator is used to model the patterns of animals in the wild this type of study is called

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?