Select the statement in if-then form.
two perpendicular lines intersect to form right angles.
select one:
a. if two lines intersect, then the lines are perpendicular & form right angles.
b. if two lines intersect, then the lines form right angles.
c. if two perpendicular lines intersect, then the lines form right angles.
d. if two perpendicular lines do not intersect, then the lines do not form right angles.

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