Agrocer stacks oranges in a four-sided pyramid that is 7 layers high. how many oranges are in the pile? the explicit formula for a pyramidal sequence is p(n)= n(n+1)(2n+1) 6 a.120 b.504 c.840 d.140

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?