Two angles are supplementary. One of the angles measures (9n) degrees and the other angle measures (3n) degrees. a) what is the value of n? and b) what is the value of each angle measure?

What is the rotational symmetry of a wheel

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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