Juana looked at her september issue of o magazine and did not see anything of interest. however, after her mother was diagnosed with bipolar disorder, juana found the issue extremely interesting because it offered advice on how to people who are suffering from this problem. the fact that the boring issue became quite interesting is most directly due to a change in juana's
a) exposure
b) cultural values
c) attention
d) personality

Power plants that rely on coal increase the amount of sulfur dioxide that dissolves into the air, eventually increasing the acidity of precipitation. the higher acidity of rain and snow can damage forests by making it more difficult for plants to absorb minerals from the soil. the equations below provide information about the market demand and supply of electricity. there is a constant marginal external cost of $25 per unit of electricity. d: qd= 200 – 2ps: qs=p – 10what quantity of electricity satisfies allocative efficiency in this market? a. 60b. 70c. 50d. 43.3