An elevator moving down passes its neighbor, an elevator moving up. their speed relative to one another is 8 m/s. what is the velocity of each elevator relative to someone standing on the first floor? assume that the elevators are traveling at the same speed, and that the upward direction is positive.

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables