If three men working at the same hourly rate are paid a total of $52.08 for a day's work, how much should be paid to five men at the same hourly rate?

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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Charlie tosses five coins.what is the probability that all five coins will land tails up.