(01.04 mc)the elevation of city a is 72 feet above sea level; the elevation of city c is 24 feet above sea level. the elevation of city d is 1 over 4 of the elevation of city c. part a: write an expression to represent the elevation, in feet, of city d. part b: simplify the expression and explain why the answer is negative or positive.

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.

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?