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A small country emits 70,000 kilotons of carbon dioxide per year. In a recent global agreement, the country agreed to cut its carbon emissions by 
1.4% per year for the next 6 years. In the first year of the agreement, the country will keep its emissions at 70,000 kilotons and the emissions will decrease 
1.4% in each successive year. How many total kilotons of carbon dioxide would the country emit over the course of the 6 year period, to the nearest whole number?
Answer:

A small country emits 7070,000000 kilotons of carbon dioxide per year. In a recent global agreement, the country agreed to cut its carbon emissions by 1.4% 1.4 \% per year for the next 66 years. In the first year of the agreement, the country will keep its emissions at 7070,000000 kilotons and the emissions will decrease 1.4% 1.4 \% in each successive year. How many total kilotons of carbon dioxide would the country emit over the course of the 66 year period, to the nearest whole number?\newlineAnswer:

Full solution

Q. A small country emits 7070,000000 kilotons of carbon dioxide per year. In a recent global agreement, the country agreed to cut its carbon emissions by 1.4% 1.4 \% per year for the next 66 years. In the first year of the agreement, the country will keep its emissions at 7070,000000 kilotons and the emissions will decrease 1.4% 1.4 \% in each successive year. How many total kilotons of carbon dioxide would the country emit over the course of the 66 year period, to the nearest whole number?\newlineAnswer:
  1. Understand the problem: Understand the problem.\newlineWe need to calculate the total carbon emissions over 66 years, with a 1.4%1.4\% reduction each year after the first year.
  2. Calculate each year: Calculate the emissions for each year.\newlineThe initial emission is 70,00070,000 kilotons. For each subsequent year, we multiply the previous year's emissions by (10.014)(1 - 0.014) to account for the 1.4%1.4\% reduction.
  3. First year emissions: Calculate the emissions for the first year.\newlineIn the first year, the emissions are 70,00070,000 kilotons since there is no reduction.
  4. Second year emissions: Calculate the emissions for the second year.\newlineFor the second year, we multiply the first year's emissions by 10.0141 - 0.014 to find the reduced emissions.\newline70,000×(10.014)=70,000×0.986=69,02070,000 \times (1 - 0.014) = 70,000 \times 0.986 = 69,020 kilotons.
  5. Third year emissions: Calculate the emissions for the third year.\newlineFor the third year, we multiply the second year's emissions by 10.0141 - 0.014.\newline69,020×(10.014)=69,020×0.98668,049.7269,020 \times (1 - 0.014) = 69,020 \times 0.986 \approx 68,049.72 kilotons.
  6. Fourth year emissions: Calculate the emissions for the fourth year.\newlineFor the fourth year, we multiply the third year's emissions by 10.0141 - 0.014.\newline68,049.72×(10.014)68,049.72×0.98667,089.0068,049.72 \times (1 - 0.014) \approx 68,049.72 \times 0.986 \approx 67,089.00 kilotons.
  7. Fifth year emissions: Calculate the emissions for the fifth year.\newlineFor the fifth year, we multiply the fourth year's emissions by (10.014)(1 - 0.014).\newline67,089.00×(10.014)67,089.00×0.98666,137.8667,089.00 \times (1 - 0.014) \approx 67,089.00 \times 0.986 \approx 66,137.86 kilotons.
  8. Sixth year emissions: Calculate the emissions for the sixth year.\newlineFor the sixth year, we multiply the fifth year's emissions by (10.014)(1 - 0.014).\newline66,137.86×(10.014)66,137.86×0.98665,196.2466,137.86 \times (1 - 0.014) \approx 66,137.86 \times 0.986 \approx 65,196.24 kilotons.
  9. Add up total emissions: Add up the emissions for all 66 years to get the total emissions.\newlineTotal emissions = 70,00070,000 (first year) + 69,02069,020 (second year) + 68,049.7268,049.72 (third year) + 67,089.0067,089.00 (fourth year) + 66,137.8666,137.86 (fifth year) + 65,196.2465,196.24 (sixth year).\newlineTotal emissions 70,000+69,020+68,049.72+67,089.00+66,137.86+65,196.24405,492.82\approx 70,000 + 69,020 + 68,049.72 + 67,089.00 + 66,137.86 + 65,196.24 \approx 405,492.82 kilotons.
  10. Round total emissions: Round the total emissions to the nearest whole number.\newlineTotal emissions 405,493\approx 405,493 kilotons.

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