If an investment of 400 increases to 800 in 16 years, the annual ...

[jlmhmf]

If an investment of 400 increases to 800 in 16 years, the annual interest rate of the investment must be _____.
 a. 18
  b. 10
  c. 9
  d. 4.5
  e. 1.8

Question 2

If both of two goods have price elasticities of demand, price elasticities of supply, income elasticities of demand and cross elasticities of demand all equal to 2.0:
 a. They are both normal and substitutes.
 b. They are both normal and complements.
  c. They are both inferior and substitutes.
 d. They are both inferior and complements.

[blfontai]

Answer to Question 1

d

Answer to Question 2

a