7 which of the following statements is true a natural

____ 7. Which of the following statements is true?
a. Natural resources per worker influence productivity only when those natural resources are
renewable.
b. The prices of most natural resources are stable or falling relative to other prices.
c. Technology requires greater use of natural resources.
d. The terms human capital and technological knowledge are used interchangeably.
____ 8. In a particular production process, if the quantities of all inputs used double, then the quantity of output
doubles as well. This means that
____ 9. If there are constant returns to scale, the production function can be written as
).
).
).
____ 10. Other things the same, a country that increases its saving rate increases ____ 11. In recent decades Americans have increased their purchase of stocks of foreign-based companies. The
Americans who have bought these stocks were engaged in
a. foreign portfolio investment.
b. indirect domestic investment.
c. foreign direct investment.
d. foreign indirect investment.
____ 12. Suppose that an American opens and operates a recording studio in Poland. This is an example of ____ 13. The opening of a new American-owned factory in Algeria would tend to increase Algeria's GDP more than it
increases Algeria's GNP because