The revenue from the sale of a product is, in dollars, R = 1500x + 9000(2x + 3)−1 − 1000 where x is the number of units sold. Find the marginal revenue when 30 units are sold. (Round your answer to two decimal places.)

Industrial engineers who specialize in ergonomics are concerned with designing workspace and devices operated by workers so as to achieve high productivity and comfort. a paper published in this research area reports on a study of preferred height for an experimental keyboard with large forearm-wrist support. a sample of 31 trained typists resulted in an average preferred height of 80.0 cm

Craig complained to his friend jess that a class was too hard and he believed that the teacher was not being fair with his grading standards. jess replied, "craig, you really have an attitude problem." what is the relationship between the manner that the term attitude is used in common conversation and the how it is defined in consumer behavior? there is no relationship. common usage is not the same as attitudes as seen by the researchers who study consumer behavior. the term attitude is widely used in popular culture in much the same way it is used in studying consumer behavior. they are different in that popular culture does not recognize that attitudes are temporary. otherwise the usage is the same. they are similar except that popular culture assumes that attitudes are related to beliefs, and research scientists have shown that there is no such relationship.

In a growing number of cities, stores are required either not to make available plastic or paper bags or to do so only for an additional fee. if this fee can be refunded when someone recycles the bag, the refund acts as a(n) incentive.