Five teachers and five students want to but ice cream from the cafeteria. the cafeteria sells chocolate, strawberry, cotton candy, and vanilla ice cream. each student buys a small ice cream for 1.25 each. each teacher buys a large ice cream for 1.50 each. how much is spent all together?

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