In order to meet the projected needs of the population in 2050, agricultural production will need to . A. double B. triple C. quadruple D. quintuple Please select the best answer from the choices provided. A B C D

How much of the united states’ electric generation comes from coal? a. about 25% b. about 50% c. about 75% d. about 90%

The graph below plots the temperature and luminosity of stars on the main sequence.

Which of the following statements best describes the quantity theory of inflation? a. inflation occurs because production cost rise and this cost increase is passed on to consumers in the form of higher prices b. inflation occurs because there is too much money in the economy c. inflation occurs because demand of good and services exceeds existing supplies d. none of these