Final answer:
Isaac's office will need 3 weeks to recycle a total of 40 kilograms of paper with the new recycling plan, accounting for the 4 kilograms already recycled.
Step-by-step explanation:
Isaac's office has already recycled 4 kilograms of paper and plans to recycle 12 kilograms each week with the new recycling plan. To find out how many weeks it will take to recycle a total of 40 kilograms, we can follow these steps:
- Subtract the initial 4 kilograms of recycled paper from the total goal of 40 kilograms to get the remaining amount to be recycled, which is 40 kg - 4 kg = 36 kg.
- Divide the remaining amount by the weekly recycling rate to determine the number of weeks needed: 36 kg ÷ 12 kg/week = 3 weeks.
Therefore, it will take 3 weeks for Isaac's Office to recycle a total of 40 kilograms of paper.