If the exchange rate rises from 100 yen per dollar to 120 yen per dollar, the dollar has appreciated

The main cost of a college education is

A) tuition if one goes to a private college and room and board if one goes to a public college. B) dependent upon whether one's parents pay for the college or not. C) the lack of practical experience from spending time in college. D) the opportunity cost of not working.

Suppose Quarto takes 10 years to double the size of its economy. According to the rule of 70, its growth rate is _____

a. 15 percent b. 10 percent c. 7 percent d. 20 percent