分数计算器

In the United States, of the people who moved from one state to another when they retired, the percentage who retired to Florida has decreased by three percentage points over the past ten years. Since many local businesses in Florida cater to retirees, this decline is likely to have a noticeably negative economic effect on these businesses.

Which of the following, if true, most seriously weakens the argument?

Mansour: We should both plan to change some of our investments from coal companies to less polluting energy companies. And here's why. Consumers are increasingly demanding nonpolluting energy, and energy companies are increasingly supplying it.

Therese: I'm not sure we should do what you suggest. As demand for nonpolluting energy increases relative to supply, its price will increase, and then the more polluting energy will cost relatively less. Demand for the cheaper, dirtier energy forms will then increase, as will the stock values of the companies that produce them.

Therese responds to Mansour's proposal by doing which of the following?

Which of the following provides the most logical completion of the argument?

A large number of Wempro Corporations department heads will retire this year. The number of employees with the qualifications now required for promotion to department head equals only half the expected vacancies. Wempro is not going to hire department heads from outside the company, have current department heads take over more than one department, or reduce the number of its departments. So some departments will be without department heads next year, since Wempro will not_______

First discovered several years ago in North American lakes and rivers, the northern snakehead is a nonnative fish with no local predators. To keep the northern snakehead's population from growing, for the past three years wildlife officials have been paying recreational fishers for each northern snakehead they catch. In this way, the officials hope to stop the northern snakeheads from eliminating rare native fish species.

To evaluate the likelihood that the wildlife officials' plan will succeed, it would be most useful to determine which of the following?

If x = 1! + 2! + 3! + ... + n! then what is the remainder when x is divided by 25?

(1) n > 8

(2) n < 10