Cassandra ordered sandwich platters for a party. there were 6 different kinds of sandwiches with 5 of each kind on a platter. cassandra ordered 5 platters in all. what is the total number of sandwiches cassandra ordered?

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An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

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