Angie and Kenny play online video games. Angie buys 1 software package and 2 months of game play, Kenny buys 1 software package and 1 month of game play. Each software package costs $45. If their total cost is $138, what is the cost of one month of game play?

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