________ is the knowledge and skill that people have obtained from education and on-the-job training

If you work 4 extra hours, and the slope of the curve showing the relationship between your income and work hours is 8, your income will increase by

A) $2. B) $4. C) $12. D) $32.

In this year, Country A has a real GDP per person that is 4 times greater than that of Country B. Country B's growth rate of real GDP per person is 3.5 percent per year

How many years will it take for Country B's real GDP per person to reach the same level that Country A had in this year? A) 10 years B) 20 years C) 40 years D) 60 years E) 56 years