The seventh-grade class is building target areas for a pe activity. the bases for the game will be in a circular shape. the diameter of each circle is 6 feet. approximately how many square feet of the turf need to be painted for a base circle? use 3.14 for π and round your answer to the nearest tenth. 7.5 square feet 9.4 square feet 18.9 square feet 28.3 square feet

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