The table shows the number of candid pictures of students for the yearbook for two consecutive years. Year Number of Photos
2015 236
2016 214

What was the percent of decrease in the number of candid student pictures from 2015 to 2016, rounded to the nearest tenth?

Perform the indicated operation. 8/a - 6/a + 7/a

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

Aquadrilateral has exactly 3 congruent sides davis claims that the figure must be a rectangle why is his claim incorrect.