This credit account carries a temporary low introductory rate (teaser rate) of%. This teaser APR applies to purchases made within the firstmonths that the account is open. After this introductory period, the APR for purchases reverts to a higher variable APR. This regular APR for purchases is calculated by% to the U. S. prime rate (assumed to be 4% in the disclosure). Therefore, if the U. S. prime rate remains at 4%, then the regular APR for purchases is%

"in the electricity industry, low average total costs are obtained only through large-scale production. in other words, the initial cost of setting up all the necessary wiring makes it risky and, most likely, unprofitable for competitors to enter the market. throughout much of the 20th century, many people viewed south africa’s de beers group as a monopoly because it controlled a large percentage of diamond production and sales. patents are granted to inventors of a product or process for a certain number of years. the reason for this is to encourage innovation in the economy. without the existence of patents, it is argued, research and development for improved electronics is unlikely to take place, since there’s nothing preventing another firm from stealing the idea, copying the product, and producing it without incurring the devel opment costs."which of the following best explains the barriers to entry that exist in this scenario? increasing returns to scale legal barriers exclusive ownership of a necessary resource