2. nancy is saving $2 from her allowance every week. marco
is saving $1 the first week, $2 the second week, $3 the third
week, and so on. at the end of 10 weeks, who will
saved more money? how much more?

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