Which term best describes the point where the perpendicular bisectors of the three sides of a triangle intersect?

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 area of the triangle shown 3 by 6

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?