Rafi had a board that was 15 and a half feet long he cut three pieces off the board that are each 3 and 7/8 foot long how much board is left

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?

Find the solution(s) to x^2-14+49=0

What is the frequency of the sinusoidal graph?