Nola hiked down a trail at a steady rate for 10 minutes. her change in elevation was -200 feet. then she continued to hike down another 20 minutes at a
different rate. her change in elevation for this part of the hike was -300 feet. during which portion of the hike did she walk down at a faster rate? explain your reasoning.

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?