A 120-foot-long rope is cut into 3 pieces. The first piece of rope is twice as long as the 2nd piece of rope. The 3rd piece of rope is three times as long as the second piece of rope. What is the length of the longest piece of rope?

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