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Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

The computer that controls a bank's automatic teller machine crashes a mean of 0.6 times per day. what is the probability that, in any seven-day week, the computer will crash less than 5 times? round your answer to four decimal places

Why is causation so much more difficult to prove than correlation?