Chuck's house weighs 100,000 pounds. he removes all of his belongings, which weigh 10,000 pounds. movers are using crib jacks to lift the house, which can only handle up to 15 tons of weight each. how many crib jacks will the movers use to lift chuck's house?

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