Your high school freshman class consists of 528 students. In recent years, only 5 out of 12 students actually graduated in four years. Approximately how many of your classmates are expected to graduate in four years?
Estimate to the nearest whole number.

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

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