Marissa wants to write an abbreviated set of directions for finding coordinates of a figure reflected across the y-axis. which mapping notation is correct? a. (x, y) --> (-x, y) b. (x, y) --> (x,-y) c. (x, y) --> (-x,-y) d. (x, y) --> (y, x)

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