❤️❤️making sure i chose the right one❤️

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?

Which of these tools or constructions is used to inscribe a hexagon inside a circle?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?