Will anyone please answer my questions? qwq they're kind of important since they're for an assignment that's due today... and thank you...

ps, I can nominate whoever with a brainlest if you'd like :3

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?

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?