Mrs. kennedy is buying pencils for each 315 students at hamilton elementary. the pencils are sold in boxes of ten. how can she use rounding to decide how many pencils to buy?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

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’s the volume of the triangular prism?