Ingram co. manufactures office furniture. during the most productive month of the year, 3,500 desks were manufactured at a total cost of $84,400. in its slowest month, the company made 1,100 desks at a cost of $46,000. using the high-low method of cost estimation, what is the variable cost per unit at the 3,500 level of operations?

Which of the following is an equation of a line parallel to the equation y=4x+1?

Solve the triangle. a = 21°, c = 105°, c = 5

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.