Deck 9: Decision Making by Individuals and Firms

Question 1

The implicit cost of capital is:

A) the explicit cost of capital that the firm might have used but didn't need to.
B) depreciation.
C) the opportunity cost of the capital used by a business.
D) the cost of human capital.

Answer 1

the opportunity cost of the capital used by a business.

Question 2

For MOST firms,economic profit is:

A) less than accounting profit.
B) equal to accounting profit.
C) greater than accounting profit.
D) negative.

Answer 2

less than accounting profit.

Question 3

John's accountant tells him that he made a profit of $43 002 running a pottery studio in Calgary.John's wife,an economist,claims John lost $43 002 running his pottery studio.This means that his wife is claiming that he incurred _____ in _____ costs.

A) $86 004;implicit
B) $43 002;implicit
C) $43 002;explicit
D) $86 004;explicit

Answer 3

$86 004;implicit

Question 4

Suppose that a local hardware store has explicit costs of $2 million per year and implicit costs of $44 000 per year.If the store earned an economic profit of $50 000 last year,this means that the store's accounting profit equalled:

A) $94 000.
B) $6 000.
C) $2.05 million.
D) $2.044 million.

Question 5

Profit computed without implicit costs is _____ profit.

A) explicit
B) accounting
C) implicit
D) economic

Question 6

Costs that are included in the economic concept of cost but that are NOT explicit costs are:

A) outlay costs.
B) accounting profits.
C) implicit costs.
D) economic profits.

Question 7

Jacquelyn is a student at a major university.Which factor is NOT an explicit cost of her attending university?

A) Opportunity cost may be larger than monetary cost.
B) Opportunity cost includes both explicit and implicit costs.
C) The real or opportunity cost of something is what you must give up to get it.
D) Opportunity cost is synonymous with explicit cost.

Question 8

Accountants use only _____ costs in their computations.

A) opportunity
B) implicit
C) explicit
D) variable

Question 9

In southern Ontario,the demand for real estate has been increasing rapidly for years.Therefore,the _____ cost of capital is _____ in southern Ontario's peach groves.

A) explicit;decreasing
B) implicit;increasing
C) implicit;decreasing
D) explicit;increasing

Question 10

The dormitories of York University are part of its:

A) land.
B) labour.
C) capital.
D) explicit costs.

Question 11

If the accounting profit for a firm is negative,the:

A) economic profit must be positive.
B) economic profit must be negative.
C) firm should produce more.
D) firm will not owe any taxes.

Question 12

Accounting profit differs from economic profit because:

A) of differences in the manner in which revenue is calculated.
B) economic costs include explicit costs,while accounting costs do not.
C) accounting costs are generally higher than economic costs because accounting costs include explicit and implicit costs,while economic costs include only explicit costs.
D) economic costs are generally higher than accounting costs because economic costs include all opportunity costs,while accounting costs include explicit costs only.

Question 13

Suppose that the Toronto Blue Jays could rent out the Rogers Centre (the field they play on)to local youth leagues for $11 000 per month.The $11 000 per month is the _____ cost of capital.

A) implicit
B) explicit
C) direct
D) total

Question 14

Expenses associated with factors of production may be _____ costs.

A) implicit
B) opportunity
C) explicit
D) implicit,opportunity,or explicit

Question 15

The implicit cost of capital is:

A) the expense associated with leasing machines.
B) the expense associated with buying machines.
C) the opportunity cost of capital used by a business.
D) irrelevant for determining economic profit.

Question 16

You own a small deli that sells sandwiches,salads,and soup.Which factor is an implicit cost of the business?

A) wages paid to part-time employees
B) the job offer you did not accept at a local catering service
C) bread,meat,and vegetables used to produce the items on your menu
D) your monthly utility bill

Question 17

Suppose that York University does not have a summer programme and could rent out the campus to various summer sports camps for $100 000.The potential revenue of the summer camps represents a(n):

A) implicit cost of capital.
B) explicit cost.
C) total cost.
D) sunk cost.

Question 18

Suppose that a local floral shop has explicit costs of $200 000 per year and implicit costs of $50 000 per year.If the store earned an economic profit of $50 000 last year,the store's accounting profit equalled:

A) $10 000.
B) $50 000.
C) $100 000.
D) $200 000.

Question 19

Money that must be paid for the use of factors of production such as labour and capital is an:

A) explicit cost.
B) accounting profit.
C) implicit cost.
D) economic profit.

Question 20

Part of the _____ associated with the Toronto Blue Jays baseball team is their batting cages used in practice.

A) labour
B) land
C) capital
D) entrepreneurship

Question 21

In making an "either-or" decision:

A) choose the activity that results in the greater economic profit.
B) choose the activity that results in the greater accounting profit.
C) continue in an activity as long as the marginal cost is greater than the marginal benefit.
D) continue in an activity as long as the marginal cost is less than the marginal benefit.

Question 22

Accountants use only _____ costs in their computations of short-run total cost.

A) opportunity
B) implicit
C) explicit
D) variable

Question 23

Use the following to answer questions :
Scenario: Accounting and Economic Profit
Rather than put the $100 000 that his grandmother left him in a mutual fund that earns 5% each year,Tommy Wang quit his job,which paid $60 000 per year,and started Wang's Wicker Furniture Store.He rented a showroom for $20 000 for the year,purchased $60 000 in wicker furniture,and incurred costs of $40 000 for sales help and advertising.In his first year,his revenue was $150 000.
(Scenario: Accounting and Economic Profit)Use Scenario: Accounting and Economic Profit.The accounting profit of Wang's Wicker Furniture Store is:

A) $200 000.
B) $60 000.
C) $30 000.
D) $0.

Question 24

During its only year of operation,a firm collected $175 000 in revenue and spent $50 000 on raw materials,labour,and utilities.The owners of the firm spent $100 000 of their own money to build the firm's factory (instead of buying bonds and earning a 10% annual rate of return),which they sold at the end of the year for $100 000.The firm's economic profit is:

A) $35 000.
B) $125 000.
C) $115 000.
D) $25 000.

Question 25

Use the following to answer questions :
Scenario: Accounting and Economic Profit
Rather than put the $100 000 that his grandmother left him in a mutual fund that earns 5% each year,Tommy Wang quit his job,which paid $60 000 per year,and started Wang's Wicker Furniture Store.He rented a showroom for $20 000 for the year,purchased $60 000 in wicker furniture,and incurred costs of $40 000 for sales help and advertising.In his first year,his revenue was $150 000.
(Scenario: Accounting and Economic Profit)Use Scenario: Accounting and Economic Profit.What is the opportunity cost of Wang's $100 000 inheritance being used to start his business?

A) $0
B) $5 000
C) $10 000
D) $100 000

Question 26

Which question BEST describes a "how much" decision?

A) Should I drive to work or ride my bicycle?
B) Should I rent a movie or watch a baseball game on television?
C) Should I attend graduate school or immediately enter the labour force?
D) Should I buy a third hot dog?

Question 27

Profit is the difference between _____ and _____.

A) total sales;total revenues
B) total profits;total costs
C) total revenues;total costs
D) marginal costs;marginal revenues

Question 28

The costs economists use in the concept of economic profit are:

A) accounting costs.
B) strictly dollar costs,not opportunity costs.
C) only implicit costs.
D) accounting costs and implicit costs (i.e. ,the value of the best opportunity forgone).

Question 29

An "either-or" decision entails:

A) deciding how much of an activity to do.
B) a choice between two activities.
C) calculating marginal costs for each activity.
D) calculating the marginal benefits for each activity.

Question 30

Economic profit is:

A) less than accounting profit if implicit costs exist.
B) always equal to accounting profit.
C) greater than accounting profit if implicit costs exist.
D) less than accounting profit if implicit costs are zero.

Question 31

Which statement describes a "how much" decision?

A) Mary is trying to decide whether to go to work or go to university after she graduates from high school next month.
B) Andrea is trying to decide whether to go to graduate school in economics or go to law school.
C) Tim is trying to decide the amount of money to save each month to buy a new car next year.
D) Andy is trying to decide whether to take a prep course for the Law School Admissions Test.

Question 32

Until recently,Rosemarie worked as an accountant,earning $30 000 annually.Then,she inherited a piece of commercial real estate that had been renting for $12 000 annually.Rosemarie decided to leave her job and operate a Peruvian restaurant in the space she inherited.At the end of the first year,her books showed total revenues of $260 000 and total costs of $230 000 for food,utilities,cooks,and other supplies.Her economic profit at the end of 1 year is:

A) $230 000.
B) $30 000.
C) $0.
D) -$12 000.

Question 33

Bessie wants to calculate the accounting and economic profits of her cattle farm in Alberta.She pays $30 000 per year in overhead,$80 000 in wages,and $20 000 in insurance.She forgoes $30 000 per year that she could make as a teacher.If her total revenue equals $140 000,that means her accounting profit is _____ and her economic profit is _____.

A) $10 000;-$20 000
B) $30 000;-$30 000
C) -$10 000;-$10 000
D) $60 000;$30 000

Question 34

Use the following to answer questions :
Scenario: Accounting and Economic Profit
Rather than put the $100 000 that his grandmother left him in a mutual fund that earns 5% each year,Tommy Wang quit his job,which paid $60 000 per year,and started Wang's Wicker Furniture Store.He rented a showroom for $20 000 for the year,purchased $60 000 in wicker furniture,and incurred costs of $40 000 for sales help and advertising.In his first year,his revenue was $150 000.
(Scenario: Accounting and Economic Profit)Use Scenario: Accounting and Economic Profit.The implicit cost of capital for Wang's Wicker Furniture Store is:

A) $0.
B) $2 000.
C) $5 000.
D) $50 000.

Question 35

Use the following to answer questions :
Scenario: Accounting and Economic Profit
Rather than put the $100 000 that his grandmother left him in a mutual fund that earns 5% each year,Tommy Wang quit his job,which paid $60 000 per year,and started Wang's Wicker Furniture Store.He rented a showroom for $20 000 for the year,purchased $60 000 in wicker furniture,and incurred costs of $40 000 for sales help and advertising.In his first year,his revenue was $150 000.
(Scenario: Accounting and Economic Profit)Use Scenario: Accounting and Economic Profit.What is the implicit cost of Wang's Wicker Furniture Store?

A) $7 000
B) $60 000
C) $65 000
D) $69 000

Question 36

George owns a dude ranch in Alberta.He pays $32 000 per year in insurance,$408 000 in wages,and $23 000 in supplies.He forgoes $32 000 per year he could make as a police officer.His total revenue last year equalled $460 000.That means his economic _____ equalled _____.

A) profit;$3 000
B) losses;$3 000
C) losses;$35 000
D) profit;$35 000

Question 37

Which statement describes an "either-or" decision?

A) Allen must decide how many courses to take this semester.
B) Sally must decide how many hours to spend studying for each of the four courses that she is taking this semester.
C) Chris must decide how many hours to work each week at his part-time job.
D) Dylan must decide whether to major in economics or finance.

Question 38

Use the following to answer questions :
Scenario: Accounting and Economic Profit
Rather than put the $100 000 that his grandmother left him in a mutual fund that earns 5% each year,Tommy Wang quit his job,which paid $60 000 per year,and started Wang's Wicker Furniture Store.He rented a showroom for $20 000 for the year,purchased $60 000 in wicker furniture,and incurred costs of $40 000 for sales help and advertising.In his first year,his revenue was $150 000.
(Scenario: Accounting and Economic Profit)Use Scenario: Accounting and Economic Profit.The economic profit of Wang's Wicker Furniture Store is:

A) $67 000.
B) $0.
C) -$20 000.
D) -$35 000.

Question 39

Andreas is a political consultant with his own firm.He travels the country and provides campaign advice for political candidates.Last year,he earned $250 000 in revenue for his services.He pays 1 employee $50 000 to manage the small office back home and pays $30 000 on rent and utilities for that office.His accountant tells him that if he sold all of the equipment,he could put that money in the bank and earn $3 000 in interest next year.Andreas also has received an offer to teach political science at a university at a salary of $100 000.Andreas's accounting profit is equal to _____,and his economic profit is equal to _____.

A) $175 000;$67 000
B) $170 000;$67 000
C) $200 000;$72 000
D) $170 000;$70 000

Question 40

You decide to quit your $60 000-per-year job as an information technology specialist and illustrate children's books.At the end of the first year of illustrating,you have earned $20 000.You also spent $5 000 for paint and paper.Your economic profit in the first year as an illustrator is:

A) $15 000.
B) $20 000.
C) -$40 000.
D) -$45 000.

Question 41

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Cost of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total cost } \\\hline 0 & \$ 0 \\1 & 9 \\2 & 20 \\3 & 33 \\4 & 48 \\5 & 65 \\\hline\end{array}\end{array}$$

-(Table: Marginal Cost of Sweatshirts)Use Table: Marginal Cost of Sweatshirts.The marginal cost of the fourth sweatshirt is:

A) $9.
B) $20.
C) $24.
D) $15.

Question 42

Marginal analysis is relevant for:

A) both "either-or" and "how much" decisions.
B) only "either-or" decisions.
C) only "how much" decisions.
D) only situations involving the time value of money.

Question 43

In economics,a marginal value refers to:

A) the value associated with an unimportant,or marginal,activity.
B) a value entered as an explanatory item in the margin of a balance sheet or other accounts.
C) the value associated with one more unit of an activity.
D) a value that is most appropriately identified in a footnote.

Question 44

The _____ is the amount by which an additional unit of activity increases its total cost.

A) marginal cost
B) average cost
C) average profit
D) marginal benefit

Question 45

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Cost of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total cost } \\\hline 0 & \$ 0 \\1 & 9 \\2 & 20 \\3 & 33 \\4 & 48 \\5 & 65 \\\hline\end{array}\end{array}$$

-(Table: Marginal Cost of Sweatshirts)Use Table: Marginal Cost of Sweatshirts.The marginal cost of the third sweatshirt is:

A) $33.
B) $13.
C) $11.
D) $9.

Question 46

Marginal benefit:

A) is the subsidiary benefit from an activity;for example,the main benefit from weight training is an increase in muscle mass,and the subsidiary or marginal benefit might be a reduction in cholesterol.
B) is the addition to total benefit due to undertaking one more unit of an activity.
C) must be increasing if total benefit is increasing.
D) normally increases as more of an activity is undertaken.

Question 47

Pauli's Pizza offers one slice for $2,two slices for $3.50,three slices for $4.50,and four slices for $5.00.The marginal cost of the third slice is:

A) $4.50.
B) $10.
C) $1.
D) $2.

Question 48

In economic analysis,the principle of marginal analysis refers to:

A) dividing large problems into smaller,more manageable ones.
B) the notion that a group's problems can be effectively analyzed by focusing on only a small subsample of the group.
C) the result that the optimal quantity of an activity is that at which marginal benefit is equal to marginal cost.
D) the result that the optimal quantity of an activity is that at which the net benefit of the representative,or marginal,individual is maximized.

Question 49

For which decision would marginal analysis be relevant?

A) spending $1 000 on a summer vacation or on painting your house
B) deciding how much to spend on a summer vacation
C) buying a new car or a second-hand car
D) eating dinner at home or going out to a restaurant for dinner

Question 50

The amount by which an additional unit of an activity increases total benefit is:

A) net benefit.
B) marginal benefit.
C) marginal cost.
D) utility.

Question 51

Feng is thinking of mowing lawns over the summer.His friend Jason mows lawns,and he says that the marginal cost of mowing the fourth lawn in a day is $40.Feng thinks about it and realizes that the total cost of mowing four lawns is:

A) $160.
B) $40.
C) $80.
D) not possible to determine from the information provided.

Question 52

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Cost of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total cost } \\\hline 0 & \$ 0 \\1 & 9 \\2 & 20 \\3 & 33 \\4 & 48 \\5 & 65 \\\hline\end{array}\end{array}$$

-(Table: Marginal Cost of Sweatshirts)Use Table: Marginal Cost of Sweatshirts.The marginal cost of the second sweatshirt is:

A) $9.
B) $20.
C) $11.
D) $29.

Question 53

A "how much" decision is BEST made by comparing the _____ of an action to the _____ of that action.

A) explicit costs;implicit costs
B) accounting profit;economic profit
C) marginal benefits;marginal costs
D) present value;net present value

Question 54

The amount by which an additional unit of an activity increases total cost is:

A) net benefit.
B) marginal benefit.
C) negative benefit.
D) marginal cost.

Question 55

Tara notices that studying for 1 hour after class increases her economics grade by 11 points.The second hour yields a 7-point gain,the third hour yields a 4-point gain,and the fourth hour yields only a 1-point gain.This means that the marginal _____ of studying decreases with study hours.

A) cost
B) benefit
C) opportunity cost
D) time

Question 56

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Cost of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total cost } \\\hline 0 & \$ 0 \\1 & 9 \\2 & 20 \\3 & 33 \\4 & 48 \\5 & 65 \\\hline\end{array}\end{array}$$

-(Table: Marginal Cost of Sweatshirts)Use Table: Marginal Cost of Sweatshirts.The marginal cost of producing sweatshirts is an example of _____ marginal costs.

A) decreasing
B) increasing
C) constant
D) random

Question 57

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Cost of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total cost } \\\hline 0 & \$ 0 \\1 & 9 \\2 & 20 \\3 & 33 \\4 & 48 \\5 & 65 \\\hline\end{array}\end{array}$$

-Constant marginal costs occur when production of each individual unit costs:

A) less than the previous one.
B) more than the previous one.
C) the same as the previous one.
D) more than the next one.

Question 58

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Cost of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total cost } \\\hline 0 & \$ 0 \\1 & 9 \\2 & 20 \\3 & 33 \\4 & 48 \\5 & 65 \\\hline\end{array}\end{array}$$

-(Table: Marginal Cost of Sweatshirts)Use Table: Marginal Cost of Sweatshirts.The marginal cost of the fifth sweatshirt is:

A) $17.
B) $15.
C) $13.
D) $11.

Question 59

Learning effects often result in _____ marginal costs.

A) decreasing
B) increasing
C) constant
D) random

Question 60

The amount by which an additional unit of an activity increases total cost is:

A) net benefit.
B) marginal benefit.
C) negative benefit.
D) marginal cost.

Question 61

Suppose that Bob has a part-time business washing cars.He has washed nine cars on a given day;the marginal benefit of washing the tenth car is $20,and the marginal cost is $12.Bob should:

A) wash the tenth car.
B) not wash the tenth car.
C) increase his marginal benefit.
D) There is not enough information to decide.

Question 62

Joan loves sushi.Her first piece of sushi normally gives her a marginal benefit of $5.Each additional piece yields a marginal benefit that declines by $0.25 per piece.If her favourite sushi bar charges $2.75 per piece of sushi,how many pieces should she eat?

A) 8
B) 10
C) 5
D) 11

Question 63

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Benefit of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total benefit } \\\hline 0 & \$ 0 \\1 & 16 \\2 & 31 \\3 & 45 \\4 & 58 \\5 & 70 \\\hline\end{array}\end{array}$$

-(Table: Marginal Benefit of Sweatshirts)Use Table: Marginal Benefit of Sweatshirts.The marginal benefit of producing the second sweatshirt is:

A) $31.
B) $16.
C) $15.
D) $14.

Question 64

The _____ benefit is the amount by which an additional unit of an activity increases its total benefit.

A) average
B) net
C) marginal
D) top

Question 65

Use the following to answer questions :
(Figure: The Marginal Benefit Curve)Use Figure: The Marginal Benefit Curve.The total benefit of mowing six lawns is approximately:

A) $19.
B) $35.
C) $154.
D) $200.

Question 66

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Benefit of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total benefit } \\\hline 0 & \$ 0 \\1 & 16 \\2 & 31 \\3 & 45 \\4 & 58 \\5 & 70 \\\hline\end{array}\end{array}$$

-(Table: Marginal Benefit of Sweatshirts)Use Table: Marginal Benefit of Sweatshirts.The marginal benefit of producing the third sweatshirt is:

A) $31.
B) $16.
C) $15.
D) $14.

Question 67

Pauli's Pizza offers one slice for $2,two slices for $3.50,three slices for $4.50,and four slices for $5.00.Sal orders two slices.From this,we know that Sal's marginal benefit from the second slice must be at least _____ and the marginal benefit from the third slice must be less than _____.

A) $3.50;$4.50
B) $3.50;$1.00
C) $1.50;$1.00
D) $1.50;$4.50

Question 68

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Benefit of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total benefit } \\\hline 0 & \$ 0 \\1 & 16 \\2 & 31 \\3 & 45 \\4 & 58 \\5 & 70 \\\hline\end{array}\end{array}$$

-(Table: Marginal Benefit of Sweatshirts)Use Table: Marginal Benefit of Sweatshirts.The marginal benefit of producing the fifth sweatshirt is:

A) $70.
B) $14.
C) $13.
D) $12.

Question 69

Use the following to answer questions : $$\begin{array}{l}\text { Marginal Benefit of Sweatshirts }\\\begin{array} { l c } \hline \text { Quantity } & \\\text { of shirts } & \text { Total benefit } \\\hline 0 & \$ 0 \\1 & 16 \\2 & 31 \\3 & 45 \\4 & 58 \\5 & 70 \\\hline\end{array}\end{array}$$

-(Table: Marginal Benefit of Sweatshirts)Use Table: Marginal Benefit of Sweatshirts.The marginal benefit of producing the fourth sweatshirt is:

A) $58.
B) $14.
C) $13.
D) $12.

Question 70

Some highways have one lane;others have two,three,or more.If each lane costs $10 million per kilometre,an economist assumes that the total benefit of a three-lane highway must be _____ million per kilometre.

A) less than $10
B) $10-$20
C) $20-$30
D) $30 or more

Question 71

The amount by which an additional unit of an activity increases total benefit is:

A) net benefit.
B) marginal benefit.
C) marginal cost.
D) utility.

Question 72

Use the following to answer questions :
(Figure: The Marginal Benefit Curve)Use Figure: The Marginal Benefit Curve.The total benefit of mowing four lawns is approximately:

A) $25.
B) $35.
C) $80.
D) $114.

Question 73

Use the following to answer questions :
(Figure: The Marginal Benefit Curve)Use Figure: The Marginal Benefit Curve.The total benefit of mowing seven lawns is approximately:

A) $172.
B) $140.
C) $60.
D) $18.

Question 74

Whenever marginal benefit is less than marginal cost,the decision maker should do _____ of the activity.

A) less
B) that exact amount
C) more
D) none

Question 75

Wendy sells ice-making machines.She can sell six per week at a price of $2 000 per machine.If she charges $2 100 per machine,she will sell only five per week.The marginal benefit of selling the sixth ice-making machine is:

A) $2 000.
B) $2 100.
C) $12 000.
D) $1500.

Question 76

While eating pizza,you discover that the marginal benefit of eating one more slice is greater than the marginal cost of that slice.You conclude that:

A) you will be better off if you eat one more slice.
B) you will be no better off and no worse off if you eat one more slice.
C) you will be worse off if you eat one more slice.
D) the total cost of eating the pizza will be more than the total benefit of eating the pizza.

Question 77

In economic analysis,at the optimal quantity of an activity:

A) marginal benefit exceeds marginal cost by the greatest amount.
B) total benefit equals total cost.
C) marginal benefit equals total benefit.
D) total benefit exceeds total cost by the greatest amount and marginal benefit equals marginal cost.

Question 78

In general,when marginal benefit is greater than marginal cost,the decision maker should do _____ of the activity.

A) less
B) that exact amount
C) more
D) none

Question 79

Werner installs custom sound systems in cars.If he installs seven systems per day,his total costs are $300.If he installs eight systems per day,his total costs are $400.Werner will install eight sound systems per day only if the eighth customer is willing to pay at least:

A) $300.
B) $400.
C) $100.
D) $50.

Question 80

To maximize her grade in economics,Stacey should study until her:

A) marginal cost of studying begins to increase.
B) marginal benefit of studying begins to decrease.
C) marginal benefit of studying equals her marginal cost of studying.
D) marginal cost of studying reaches zero.