An equation is shown, where x> 0, z<0, and Ixl>Izl xy+z
which statements re true?
A. y < 0
b. y > 0
c. Iyl < 1
d. Iyl = 1
e. Iyl > 1

In the diagram of circle o, what is the measure of zabc?

If value of cos330° is √3/2 then find tan165°.

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