3. In the first simulation with 2 workers, how many total items are sorted in one hour?

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1 Name: Date: Part I: Introduction 1. List 4 household items that can be recycled. 2. What is Single Stream Recycling? 3. What are three benefits of recycling? 4. What are three possible disadvantages of recycling? Part II: Simulation Video #1 1. What is a process simulation? 2. Why do engineers use simulations to study systems design? 3. In the first simulation with 2 workers, how many total items are sorted in one hour? How many missed items are there? Page 1 of 7

2 4. The table below shows data collected from the first simulation with 2 oators working 1 hour. a. Convert the weight of each material into pounds, rounding to the nearest 100th. (1 lb = 16 oz) b. Calculate the amount of money collected material, rounding to the nearest cent. c. Determine the total amount of money collected. Lbs Oz Weight in Pounds (nearest 100th) Pound #1 PET $0.79 #2 HDPE $0.86 #3 PVC $0.64 #4 LDPE $1.03 #5 PP $0.90 #6 PS $ Glass $ Fiber $ Aluminum $ Steel $0.32 Types of Plastics Name and Examples #1 PET Polyethylene Terephthalate (Soda Bottles, Peanut Butter Jars) #2 HDPE #3 PVC #4 LDPE #5 PP #6 PS High-Density Polyethylene (Milk Gallons, Detergent Containers) Polyvinyl Chloride (Plastic Wrap, Some Water Bottles) Low Density Polyethylene (Plastic Bags, 6-Pack Rings) Polypropylene (Yogurt Containers, Straws) Polystyrene (Styrofoam Cups, Foam Egg Cartons) Page 2 of 7

3 d. Calculate the cent of the overall number of items collected that comes from each type of material. Round to Percent of Overall # of Items the nearest tenth of a cent. #1 PET 644 #2 HDPE 421 #3 PVC 34 #4 LDPE 26 #5 PP 353 #6 PS Glass Fiber Aluminum Steel 121 e. Copy your data from the last column in the table for question 4c. ( ) Then determine what cent of the overall money collected comes from each type of material. Round to the nearest tenth of a cent. #1 PET #2 HDPE #3 PVC Percent of Overall #4 LDPE #5 PP #6 PS f. Does the material with the highest centage of # of Items provide the company with the highest centage of Overall? Why or why not? --- Glass --- Fiber --- Aluminum --- Steel Page 3 of 7

4 5. Suppose each oator earns $7.25 hour and works an 8-hour day. Calculate the daily profit for this recycling company, assuming the collected items are the same each hour. Show all work. (Profit = Total Labor Cost) Daily Profit = 6. How does the number of missed items affect the company? 7. What are some changes that can be made to the system design to increase profit for the company? Part III: Simulation Video #2 1. What changes are made in the second simulation? 2. How many total items are sorted in one hour? How many missed items are there? 3. How does this data compare data to the first simulation? Page 4 of 7

5 4. The table below shows data collected from the second simulation with 4 oators working 1 hour. Lbs Oz Weight in Pounds (nearest 100th) Pound #1 PET $0.79 $43.60 #2 HDPE $0.86 $57.89 #3 PVC $0.64 $1.72 #4 LDPE $1.03 $.71 #5 PP $0.90 $20.53 #6 PS $0.99 $ Glass $0.01 $ Fiber $0.45 $ Aluminum $0.70 $ Steel $0.32 $1.90 a. Calculate the total amount of money collected. b. Determine the daily profit for the company using 4 oators working 8-hour days and earning $7.25/hr. Show all work. (Profit = Total Labor Cost) Daily Profit = c. How does the profit compare to the first simulation with 2 oators? 5. Make a prediction about the daily profit for the third simulation which has 6 oators. Page 5 of 7

6 Part IV: Simulation Video #3 Household Container Recycling - High School 1. How many total items are sorted in one hour? How many missed items are there? 2. How does this data compare data to the first simulation? 3. How does this data compare to the second simulation? 4. The table below shows data collected from the third simulation with 6 oators working 1 hour. Lbs Oz Weight in Pounds (nearest 100th) Pound #1 PET $0.79 $45.73 #2 HDPE $0.86 $59.56 #3 PVC $0.64 $1.64 #4 LDPE $1.03 $.65 #5 PP $0.90 $18.34 #6 PS $0.99 $ Glass $0.01 $ Fiber $0.45 $ Aluminum $0.70 $ Steel $0.32 $1.96 a. Calculate the total amount of money collected. b. Determine the daily profit for the company using 6 oators working 8-hour days and earning $7.25/hr. Show all work. (Profit = Total Labor Cost) Daily Profit = Page 6 of 7

7 c. How does the profit compare to the first simulation with 2 oators? Calculate the cent change in the profit between these two simulations. Percent Change = Original Profit New Profit x 100 Original Profit d. How does the profit compare to the second simulation with 4 oators? Calculate the cent change in the profit between these two simulations. e. How do these results compare to your prediction? f. Explain why the results may not be what people would have predicted. g. Besides the number of oators working, what are other factors that could be considered when engineers redesign this system? Page 7 of 7