Two trains simultaneously left points m and n and headed towards each other. the distance between point m and point n is 380 mi. the speed of the train, which started, from point n was 5 mph faster than the speed of the other train. in two hours after the departure the distance between the trains was 30 mi. what is the speed of each train?

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