The student council has decided to have a raffle at the carnival. they came up with a table to show the relationship between the number of tickets bought and the number of raffle entries. explain why it could be for the student council to determine an equation to represent this data.

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?

Math it's appreciated. (picture provided)

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd