Which two theorems would justify that m∠4 = m∠6, given that m∠5 = m∠6 in the diagram below? vertical angles theorem, consecutive interior angles theorem
corresponding angles theorem, angle addition theorem
right angles theorem, exterior angles theorem
vertical angles theorem, alternate interior angles theorem

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