(8,1), (-2,-5) midepoint

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?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i