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:
Q. 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:
Understand the problem: Understand the problem.We need to calculate the total carbon emissions over 6 years, with a 1.4% reduction each year after the first year.
Calculate each year: Calculate the emissions for each year.The initial emission is 70,000 kilotons. For each subsequent year, we multiply the previous year's emissions by (1−0.014) to account for the 1.4% reduction.
First year emissions: Calculate the emissions for the first year.In the first year, the emissions are 70,000 kilotons since there is no reduction.
Second year emissions: Calculate the emissions for the second year.For the second year, we multiply the first year's emissions by 1−0.014 to find the reduced emissions.70,000×(1−0.014)=70,000×0.986=69,020 kilotons.
Third year emissions: Calculate the emissions for the third year.For the third year, we multiply the second year's emissions by 1−0.014.69,020×(1−0.014)=69,020×0.986≈68,049.72 kilotons.
Fourth year emissions: Calculate the emissions for the fourth year.For the fourth year, we multiply the third year's emissions by 1−0.014.68,049.72×(1−0.014)≈68,049.72×0.986≈67,089.00 kilotons.
Fifth year emissions: Calculate the emissions for the fifth year.For the fifth year, we multiply the fourth year's emissions by (1−0.014).67,089.00×(1−0.014)≈67,089.00×0.986≈66,137.86 kilotons.
Sixth year emissions: Calculate the emissions for the sixth year.For the sixth year, we multiply the fifth year's emissions by (1−0.014).66,137.86×(1−0.014)≈66,137.86×0.986≈65,196.24 kilotons.
Add up total emissions: Add up the emissions for all 6 years to get the total emissions.Total emissions = 70,000 (first year) + 69,020 (second year) + 68,049.72 (third year) + 67,089.00 (fourth year) + 66,137.86 (fifth year) + 65,196.24 (sixth year).Total emissions ≈70,000+69,020+68,049.72+67,089.00+66,137.86+65,196.24≈405,492.82 kilotons.
Round total emissions: Round the total emissions to the nearest whole number.Total emissions ≈405,493 kilotons.
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