A certain paperback sells for $12. The author is paid royalties of 11% on the first 10,000 copies sold, 12.5% on the next 5000 copies, and 19% on any additional copies. Find a piecewise-defined function R that specifies the total royalties if x copies are sold. (Simplify your answer completely.)

How can surveys and questionnaires be used to gather data for informal reports? surveys and questionnaires should be used only to gather data for formal reports. surveys and questionnaires can be used to collect confidential information for informal performance reviews. surveys and questionnaires allow you to collect data efficiently and economically from groups of people?

For june, gold corp. estimated sales revenue at $600,000. it pays sales commissions that are 4% of sales. the sales manager's salary is $285,000, estimated shipping expenses total 1% of sales, and miscellaneous selling expenses are $15,000. how much are budgeted selling expenses for the month of july if sales are expected to be $540,000.

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