Uppose the lifetime (in months) of certain type of battery is a random variable with pdf In a random sample of 4 such batteries, what is the probability that at least 2 of them will work for more than 6 months (round off to second decimal place)

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

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?

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?