A weather station on the top of a mountain reports that the temperature is 0°C currently and has been falling at a constant rate of 5°C per hour. What will the temperature be in 2 hours if the temperature continues to fall at this rate?

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