The water level in a pool is 200 cm measured form the pool's bottom, when this begin to drain. After three
minutes the water level is 179
cm. At what time will the
depth of the water be 144 cm?

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