1. Elena wants to add (2.3 x 10) + (3.6 x 106) and writes (2.3 x 105) + (3.6 x 106) = (5.9 x 106). Explain to Elena what her mistake was
and what the correct solution is.

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