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 6

2 4. The table below shows data collected from the first simulation with 2 oators working 1 hour. a. Finish completing the Weight in Pounds column, rounding to the nearest tenth. (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. Code # Items Lbs Oz Weight in Pounds (nearest tenth) Pound #1 PET $0.79 $38.08 #2 HDPE $0.86 $54.09 #3 PVC $0.64 #4 LDPE $1.03 #5 PP $0.90 $16.11 #6 PS $0.99 $ Glass $0.01 $ Fiber $ Aluminum $0.70 $ Steel $0.32 Types of Plastics Code 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) TOTAL: Page 2 of 6

3 d. Compare your two bar graphs to answer the following questions: i. Which type of material has the most number of items collected? ii. Which type of material has the least number of items collected? iii. From which type of material is the most amount of money collected? iv. From which type of material is the least amount of money collected? iii. Does the type of material with the most number of items collected supply the biggest collection of money? Why/Why not? 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? Page 3 of 6

4 Part III: Simulation Video #2 Household Container Recycling - Middle School 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? 4. The table below shows data collected from the second simulation with 4 oators working 1 hour. Code # Items Lbs Oz Weight in Pounds (nearest tenth ) Pound #1 PET $0.79 $43.61 #2 HDPE $0.86 $57.88 #3 PVC $0.64 $1.73 #4 LDPE $1.03 $0.72 #5 PP $0.90 $20.52 #6 PS $0.99 $ Glass $0.01 $ Fiber $0.45 $ Aluminum $0.70 $ Steel $0.32 $2.21 TOTAL: $ a. 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 = b. How does the profit compare to the first simulation with 2 oators? Page 4 of 6

5 5. Make a prediction about the daily profit for the third simulation which has 6 oators. Part IV: Simulation Video #3 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. Code # Items Lbs Oz Weight in Pounds (nearest tenth) Pound #1 PET $0.79 $45.74 #2 HDPE $0.86 $59.60 #3 PVC $0.64 $1.66 #4 LDPE $1.03 $.62 #5 PP $0.90 $18.36 #6 PS $0.99 $ Glass $0.01 $ Fiber $0.45 $ Aluminum $0.70 $ Steel $0.32 $1.95 TOTAL: $ a. 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 5 of 6

6 b. How does the profit compare to the first simulation with 2 oators? c. How does the profit compare to the second simulation with 4 oators? d. How do these results compare to your prediction? e. Explain why the results may not be what people would have predicted. f. Besides the number of oators working, what are other factors that could be considered when engineers redesign this system? Page 6 of 6