The graph shows marlee's speeds through the duration of her run. what is the rate of change of her speed between minutes 1 and 5?
a) 0 miles per minute
b) 1 mile per minute
c) 3 miles per minute
d) 5 miles per minute

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