A company that manufactures heavy industrial equipment employs dozens of people in jobs that are considered quite hazardous. The company obeys federal regulations governing workplace safety, and, to comply with new regulations instituted to avoid recently discovered risks from airborne particulate matter, company engineers were required to install extremely expensive air filtering equipment. However, despite the expense of the air filtering equipment, the company's operating costs for the quarter were considerably lower than normal. Which of the following, if true, most helps to resolve the apparent paradox?A. Over half the company's expenditures to maintain worker safety go to pay for protective garments; yet only a small percentage of such expenditures go to pay for nose and mouth filters. B. Prior to the installation of the air filtering equipment, the company had had to prevent damage due to particulate contamination of manufacturing equipment. C. The company's costs of labor, which make up a large fraction of operating costs, increased during the same period. D. When the air filtering equipment was installed in the manufacturing facility, the company took the opportunity to upgrade the temperature control equipment. E. The majority of the company's employees work in the areas of the plant in which the air filtering equipment was installed.

The hawthorne works was a large western electric factory with 45,000 employees. during the 1920s and 1930s, hawthorne works was the site of some well-known industrial studies. in one of the studies, researchers investigated the impact of different working conditions on worker productivity. prior to the start of the study, researchers secretly measured workers' productivity for several weeks. then researchers chose two workers, who then chose their own teams. the teams were separated from the general workforce and completed their work in different experiment rooms where the researchers could observe them more easily. over a 5-year period researchers manipulated the structure of the workday for each team (number and duration of breaks and number of hours per shift). for each of these changes in working conditions, the researchers measured the effect on productivity. for some conditions, such as frequent short breaks, workers rebelled by intentionally decreasing productivity. why did the researchers secretly measure the workers' productivity before creating the two treatment groups? a, to create similar treatment groups so that a cause-and-effect relationship could be establishedb, to draw conclusions about the productivity of all workers in the plant based on the test groupsc, to directly control for confounding variablesd, to provide a baseline for measuring worker productivity

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About time delivery co. incurred the following costs related to trucks and vans used in operating its delivery service: classify each of the costs as a capital expenditure or a revenue expenditure. 1. changed the oil and greased the joints of all the trucks and vans. 2. changed the radiator fluid on a truck that had been in service for the past four years. 3. installed a hydraulic lift to a van. 4. installed security systems on four of the newer trucks. 5. overhaul the engine on one of the trucks purchased three years ago. 6. rebuilt the transmission on one of the vans that had been driven 40,000 miles. the van was no longer under warranty. 7. removed a two-way radio from one of the trucks and installed a new radio with a greater range of communication. 8. repaired a flat tire on one of the vans. 9. replaced a truck's suspension system with a new suspension system that allows for the delivery of heavier loads. 10. tinted the back and side windows of one of the vans to discourage theft of contents.