Cynthia beach wants to buy a rug for a room that is 24 ft wide and 31 ft long. she wants to leave a uniform strip of floor around the rug. she can afford to buy 638 square feet of carpeting. what dimensions should the rug have?

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