Mr. Bostelmann is decorating his math classroom with hexagonal pyramids. He needs to buy enough plaster to create 6 pyramids. If the apothem of the hexagonal base is and the height of the pyramid 5 inches, how much plaster does he need?

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?