Survey of Economics (MindTap Course List)
Survey of Economics (MindTap Course List)
9th Edition
ISBN: 9781305260948
Author: Irvin B. Tucker
Publisher: Cengage Learning
Question
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Chapter 5, Problem 4SQP

(a)

To determine

Price elasticity of demand.

(a)

Expert Solution
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Explanation of Solution

The general formula for calculating price elasticity of demand is given below.

Price elasticity of demand curve=QuantityNewQuantityOld(QuantityNew+QuantityOld2)PriceNewPriceOld(PriceNew+PriceOld2) (1)

Substitute the respective values in Equation (1) to calculate the price elasticity of demand in the first case.

Price elasticity of demand=(4020(40+202))(2025(20+252))=(2030)(522.5)=0.6666660.222222=3

Price elasticity of demand is 3 (ignore the sign).

Economics Concept Introduction

Price elasticity of demand: Price elasticity refers to the responsiveness of changes or the change in quantity demanded due to the change in price.

(b)

To determine

Price elasticity of demand.

(b)

Expert Solution
Check Mark

Explanation of Solution

By using Equation (1), the calculation of price elasticity of demand in second case is shown below:

Price elasticity of demand=(6040(60+402))(1520(15+202))=(2050)(517.5)=0.40.285714=1.4

Price elasticity of demand is 1.4.

Economics Concept Introduction

Price elasticity of demand: Price elasticity refers to the responsiveness of changes or the change in quantity demanded due to the change in price.

(c)

To determine

Price elasticity of demand.

(c)

Expert Solution
Check Mark

Explanation of Solution

By using Equation (1), the calculation of price elasticity of demand in third case is shown below:

Price elasticity of demand=(8060(80+602))(1015(10+152))=(2070)(512.5)=0.2857140.4=0.71

Price elasticity of demand is .71.

Economics Concept Introduction

Price elasticity of demand: Price elasticity refers to the responsiveness of changes or the change in quantity demanded due to the change in price.

(d)

To determine

Change in demand and supply.

(d)

Expert Solution
Check Mark

Explanation of Solution

By using Equation (1), the calculation of price elasticity of demand in fourth case is shown below:

Price elasticity of demand=(10080(100+802))(510(5+102))=(2090)(57.5)=0.2222220.666666=0.33

Price elasticity of demand is .33.

Economics Concept Introduction

Price elasticity of demand: Price elasticity refers to the responsiveness of changes or the change in quantity demanded due to the change in price.

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Exercise 3 The production function of a firm is described by the following equation Q=10,000-3L2 where L stands for the units of labour. a) Draw a graph for this equation. Use the quantity produced in the y-axis, and the units of labour in the x-axis. b) What is the maximum production level? c) How many units of labour are needed at that point? d) Provide one reference with you answer.
Exercise 1 Consider the market supply curve which passes through the intercept and from which the market equilibrium data is known, this is, the price and quantity of equilibrium PE=50 and QE=2000. Considering those two points, find the equation of the supply. Draw a graph of this line. Provide one reference with your answer. Exercise 2 Considering the previous supply line, determine if the following demand function corresponds to the market demand equilibrium stated above. QD=3000-2p.
Consider the market supply curve which passes through the intercept and from which the marketequilibrium data is known, this is, the price and quantity of equilibrium PE=50 and QE=2000.a. Considering those two points, find the equation of the supply. b. Draw a graph of this line.
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