8. The economic perspective used in customer decision making at fast-food restaurants is reflected in: A) customers leaving rather than waiting if all lines are long. B) all customer lines tending to be of equal length. C) customers selecting the shortest line. D) all of the above. 9. Suppose the price elasticity coefficients of demand are 1.43, 0.67, 1.11, and 0.29 for products W, X, Y, and Z respectively. A 1 percent decrease in price will increase total revenue in the case(s) of: A) X and Z. B) Y and Z. C) W and Y D) and W. E) both B and D. 24.which is normative statement A The temperature is high today B the humdity is humidity today C) It will cool off later this evening. D) It is too hot to play tennis today. E) Both A and B. 35. If in the short run the demand for mass transit is inelastic and in the long run the demand is elastic, then a price: A) increase will decrease total revenue in the short run but increase total revenue in the long run. B) decrease will decrease total revenue in the short run and decrease total revenue in the long run. C) decrease will increase total revenue in the short run but decrease total revenue in the long run. D) increase will increase total revenue in the short run but decrease total revenue in E) the long run. both A and Care correct