Afather is now three times as old as his son. twelve years ago he was six times as old as his son. how old are the son and father now

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.

How does the bare soil surface type affect the amount of runoff