When your sister goes to work, what scientific discipline is used in the design of her workplace to incorporate comfort, efficiency, and safety for her

The law of demand is the assertion that ?

Which of the following best explains how the invention of money affected the barter system? a. the invention of money supplemented the barter system by providing a nonperishable medium of exchange b. the invention of money completely replaced the barter system with a free-market system c. the invention of money had no effect on the barter system d. the invention of money drastically reduced the value of goods used in the barter system 2b2t

Amachine purchased three years ago for $720,000 has a current book value using straight-line depreciation of $400,000: its operating expenses are $60,000 per year. a replacement machine would cost $480,000, have a useful life of nine years, and would require $26,000 per year in operating expenses. it has an expected salvage value of $130,000 after nine years. the current disposal value of the old machine is $170,000: if it is kept 9 more years, its residual value would be $20,000. calculate the total costs in keeping the old machine and purchase a new machine. should the old machine be replaced?