Final answer:
To calculate the CO2 emissions from heated electric dryers used in a fast food chain's restrooms, the total emissions are first found per store by multiplying the CO2 per use by the number of uses per day, then converting grams to pounds. Multiplying by the number of stores gives the total daily emissions chain-wide, which amounts to approximately 82,732 pounds of CO2 per day.
Step-by-step explanation:
To calculate the total amount of carbon dioxide released into the atmosphere from the use of heated electric dryers in the restrooms of a fast food chain operating 5,200 stores in North America, we need to consider the number of operations per dryer and the amount of CO2 emitted per operation. Each dryer operates 190 times per day in both the ladies' and men's restrooms, so that's 380 operations per day for both restrooms in one store. According to the information provided, a standard heated electric dryer emits 19 grams of CO2 per use.
First, calculate the daily CO2 emissions for one store:
- 380 operations/day × 19 grams CO2/operation = 7,220 grams CO2/day/store
Now convert this to pounds (1 pound = 453.592 grams):
- 7,220 grams/day/store ÷ 453.592 grams/pound ≈ 15.91 pounds CO2/day/store
Next, calculate the total daily CO2 emissions for all 5,200 stores:
- 15.91 pounds CO2/day/store × 5,200 stores ≈ 82,732 pounds CO2/day
Therefore, approximately 82,732 pounds of CO2 are released into the atmosphere each day from the heated electric dryers of the fast-food chain's stores.
By rounding to the nearest whole number, the total emissions are approximately 82,732 pounds of CO2 per day.