Triangle pqr with side p across from angle p, side q across from angle q, and side r across from angle r
if r, p, and q are given, then explain whether the law of sines or the law of cosines should be used to solve for ∠q.
law of cosines, two sides and the included angle are known
law of cosines, all sides are known
law of sines, two sides and an opposite angle are known
law of sines, two angles and the included side are known

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