In the United States, the Great Depression peaked in:

According to economist Milton Friedman, a. the short-term validity of the Phillips curve is questionable

b. there might be a short-term trade-off between unemployment and inflation but not a permanent trade-off. c. trade-off happens between unemployment and inflation happens in the long run but not in the short run. d. the long-run trade-off between unemployment and inflation comes from unanticipated inflation.

Suppose the growth rate of Carolina is 5 percent. According to the rule of 70, it will take _____ years for the economy to double in size

a. 20 b. 14 c. 30 d. 40