A bank has 150 employees. Unfortunately the decrease their staff by 10% and again by another 20%. How many staff now work in the bank ? A) 120
B) 108
C) 118
D) 128

Which fraction is not equivalent to 8/12 a. 2/3 b. 24/36 c. 4/10 d. 6/10

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.

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?