A school needs to buy a new notebook and desktop computers for its computer lab. The notebook computers cost $350 each, and the desktop computers cost $400 each. How much would it cost to buy 19 notebooks and 15 desktop computers? How much would it cost to buy nn notebooks and dd desktop computers?

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?