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Mathematics homework help

The next two questions are based on the following information.

Jane wants to setup a photo shop. The cost to rent an office is $150 per week. The variable cost of making one photo is $20 and she can sell it for $50.

 

Question 1 of 2

5.0 Points

 

 

Jane has to sell photos per week to break even. (Please only enter an integer and include no units.) 

 

 

Question 2 of 2

5.0 Points

 

 

If Jane sells 10 units, her profits would be dollars. (Please only enter an integer and include no units.) 

 


The next two questions are based on the following information. 

Paul wants to choose one of the two investment opportunities over three possible scenarios. Investment 1 will yield a return of $10,000 in Scenario 1, $2,000 in Scenario 2, and a negative return of -$5,000 in Scenario 3. Investment 2 will yield a return of $6,000 in Scenario 1, $4,000 in Scenario 2, and zero in Scenario 3. The probability for Scenario 1 is 0.2, for Scenario 2 is 0.3, and for Scenario 3 is 0.5.

 

Question 1 of 2

5.0 Points

If you were to choose the investment that maximizes Paul’s Expected Money Value (EMV), then you should choose __________.

 

 

A.Investment 1

 

B.Investment 2

 

C.Indifferent

 

 

 

Question 2 of 2

5.0 Points

 

 

If Paul is uncertain about the return for Investment 1 in Scenario 1, then this return has to be dollars in order to make Paul indifferent between these two investments (i.e. the two investments would have the same EMV.) (Please only enter an integer and include no units.) 
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Part 3 of 8 – Part 3

The next three questions are based on the following information. 

Sam has a cleaning service. To better allocate his resources, he would like to forecast his weekly orders based on the order number he received in the past 13 weeks as shown in the following table. 

Week

Demand

Week 1

11

Week 2

14

Week 3

16

Week 4

10

Week 5

15

Week 6

17

Week 7

11

Week 8

14

Week 9

17

Week 10

12

Week 11

14

Week 12

16

Week 13

15

 

 

Question 1 of 3

5.0 Points

 

 

Using a three week moving average, Sam’s forecast for his Week 14 order number is . (Please round to two decimal points and include no units.) 
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Part 3 of 8 – Part 3

 

Question 2 of 3

5.0 Points

 

 

Using a three week weighted moving average with weights 3, 2, and 1 given to the most recent, second most recent, and third most recent week, respectively, Sam’s forecast for his Week 14 order number is . (Please round to two decimal points and include no units.) 

Part 3 of 8 – Part 3

The next three questions are based on the following information. 

 

Question 3 of 3

5.0 Points

If the MAD for moving average is 4.17 and the MAD for weighted moving average is 2.38, then which forecast is more accurate?

 

 

A.Moving average

 

B.Weighted moving average

 

C.The same

 

D.Not enough information to evaluate.

 

Reset Selection

Part 4 of 8 – Part 4

The next three questions are based on the following information. 

A grocery store needs to sell 3,000 cartons of 2L 2% milk per month. The sales is relatively constant throughout the month. The owner of this grocery store purchases milk from a supplier 50 miles away for $2 per carton, and it takes a day to restock. The holding cost per carton per month is $1.5, and the ordering cost per order is about $18.5 including labor, gas and depreciation. Consider a month of 30 days.

 

Question 1 of 3

5.0 Points

 

 

The optimal order quantity is about cartons of milk, and the average inventory is about cartons. (Please round to the closest integer and include no units.) 
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Part 4 of 8 – Part 4

 

Question 2 of 3

5.0 Points

 

 

Given the optimal order quantity calculated above, if the average inventory is 136 cartons, then the monthly holding cost is dollars, and the total cost including the cost of supply or the total unit cost for all units, holding and ordering is dollars. (Please round to two decimal points and include no units.) 
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Question 3 of 3

3.0 Points

 

 

The reorder point is cartons. (Please only enter an integer and include no units.)

Part 5 of 8 – Part 5

The next two questions are based on the following information. 

A cafeteria wants to introduce a new burger, with bread and beef together weighing at least 1 ounce. The cafeteria manage also wants the new burger to meet a new nutrition standard, i.e. contains at least 7 units of Vitamin A and 10 units of Vitamin B. Each ounce of beef contains 1 unit Vitamin A and 6 units of Vitamin B, while each ounce of bread contains 2 units Vitamin A and 1 units of Vitamin B. The price of beef is $0.5 per ounce and the price of bread is $0.1 per ounce. 

 

Question 1 of 2

5.0 Points

 

 

To minimize the cost, the cafeteria should use ounces of beef and ounces of bread to make the new burger. (Please round to two decimal points and include no units.) 
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Part 5 of 8 – Part 5

 

Question 2 of 2

5.0 Points

 

 

If the cafeteria uses 1.18 ounces of beef and 2.91 ounces of bread to make the new burger, the total cost of the new burger (excluding other ingredients) is dollars, (Please round to twodecimal points and include no units.) and the content of Vitamin A is while that for Vitamin B is . (Please round to the closest integer and include no units for the last two answers.) 

Part 6 of 8 – Part 6

The next three questions are based on the following information.

The Low Knock Oil Company produces two grades of cut-rate gasoline for industrial distribution. The grades, regular and economy, are produced by refining a blend of two types of crude oil, type X100 and type X220. Each crude oil differs not only in cost per barrel, but in composition as well. The following table indicates the percentage of crucial ingredients found in each of the crude oils and the cost per barrel for each:

CRUDE OIL TYPE

INGREDIENT A (%)

INGREDIENT B (%)

COST/BARREL ($)

X100

35

55

30.00

X220

60

25

34.80

Weekly demand for the regular grade of Low Knock gasoline is at least 25,000 barrels, and demand for the economy is at least 32,000 barrels per week. At least 45% of each barrel of regular must be ingredient A. At most 50% of each barrel of economy should contain ingredient B. While the gasoline yield from one barrel of crude depends on the type of crude and the type of processing used, we will assume for the sake of this example that one barrel of crude oil will yield 0.46 barrel of gasoline.

Hint: You may refer to the Low Knock Oil Company example analyzed on page 326-327 in the textbook (Program 8.9), and simply adjust your constraints for the demands accordingly.

 

Question 1 of 3

3.0 Points

At the optimal production, does the company just make enough regular gasoline to meet the demand? Does the company just make enough economy gasoline to meet the demand?

 

 

A.Yes, yes

 

B.Yes, no

 

C.No, yes

 

D.No, no

 

 

Part 6 of 8 – Part 6

Question 2 of 3

3.0 Points

 

 

To minimize the production cost, the optimal amount of X100 crude oil used in producing regulargasoline is barrels, and the optimal amount of X220 crude oil used in producing regular gasoline is barrel. (Please round to the closest integer and include no units.) 

 

Question 3 of 3

3.0 Points

 

 

To minimize the production cost, the optimal amount of X100 crude oil used in producing economygasoline is barrels, and the optimal amount of X220 crude oil used in producing economy gasoline is barrel. (Please round to the closest integer and include no units.)

 

Part 7 of 8 – Part 7

The next four questions are based on the following information. At a car wash station, on average, there are 4 cars coming in for the service every 10 minutes. The average wash time is 2 minutes. The Poisson distribution is appropriate for the arrival rate and service times are exponentially distributed. Please convert all rates into cars per hour and answer the following questions.

 

Question 1 of 4

5.0 Points

 

 

The average time a car spent in the waiting line is hours, and the total time a car spent in this car wash station is hour. (Please round to two decimal points and include no units.) 
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Question 2 of 4

3.0 Points

 

 

The average number of cars in this car wash station is . (Please round to the closestinteger and include no units.) 
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Question 3 of 4

5.0 Points

 

 

The probability that there are no cars in this station is . (Please round to one decimal points and include no units.) 
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Question 4 of 4

5.0 Points

 

 

The probability that there are exactly two cars in this station is . (Please round to threedecimal points and include no units.) 

 

 

Part 8 of 8 – Part 8

The next three questions are based on the following information. 

To study the weight accuracy of a 50lb fertilizer bag, 12 samples of 12 bags of fertilizer in each sample were taken and the results are as follows. 

 

Mean

Range

Sample 1

47

1.1

Sample 2

46

1.31

Sample 3

46

0.91

Sample 4

47

1.1

Sample 5

48

1.21

Sample 6

50

0.82

Sample 7

49

0.86

Sample 8

49

1.11

Sample 9

51

1.12

Sample 10

52

0.99

Sample 11

50

0.86

Sample 12

51

1.2

 

 

Question 1 of 3

5.0 Points

 

 

The overall average weight of a bag of fertilizer is pound, and the average range is pound. (Please round to two decimal points and include no units.) 
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Part 8 of 8 – Part 8

The next three questions are based on the following information. 

To study the weight accuracy of a 50lb fertilizer bag, 12 samples of 12 bags of fertilizer in each sample were taken and the results are as follows. 

 

Mean

Range

Sample 1

47

1.1

Sample 2

46

1.31

Sample 3

46

0.91

Sample 4

47

1.1

Sample 5

48

1.21

Sample 6

50

0.82

Sample 7

49

0.86

Sample 8

49

1.11

Sample 9

51

1.12

Sample 10

52

0.99

Sample 11

50

0.86

Sample 12

51

1.2

 

 

Question 2 of 3

5.0 Points

 

 

The upper control limit for a 99.7% control chart for the mean is pound, and the lowercontrol limit is pound. (Please round to two decimal points and include no units. Please enter the upper limit first.) 
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Question 3 of 3

5.0 Points

 

 

The upper control limit for a 99.7% control chart for the range is pound, and the lower control limit is pound. (Please round to two decimal points and include no units. Please enter the upper limit first.) 
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