A certain forest covers an area of 3600 km2. Suppose that each year this area decreases by 3%. What will the area be after 14 years?Use the calculator provided and round your answer to the nearest square kilometer.km2
Question
A certain forest covers an area of 3600 km2. Suppose that each year this area decreases by 3%. What will the area be after 14 years?Use the calculator provided and round your answer to the nearest square kilometer.km2
Solution 1
To solve this problem, we need to understand that the forest is decreasing at a rate of 3% per year. This is a compound decrease problem.
Here are the steps to solve it:
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Convert the percentage decrease to a decimal by dividing by 100. So, 3% becomes 0.03.
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Subtract this from 1 (since the area is decreasing, not increasing). So, 1 - 0.03 = 0.97. This is the annual rate of decrease.
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Now, we need to apply this decrease over 14 years. We do this by raising the rate of decrease to the power of the number of years. So, 0.97^14 = 0.688.
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Finally, we multiply this by the initial area of the forest to find the area after 14 years. So, 3600 km^2 * 0.688 = 2476.8 km^2.
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Rounding this to the nearest square kilometer, we get 2477 km^2.
So, the area of the forest will be approximately 2477 km^2 after 14 years.
Solution 2
To solve this problem, we need to understand that the forest is decreasing at a rate of 3% per year. This is a compound decrease problem.
Here are the steps to solve it:
-
Convert the percentage decrease to a decimal by dividing by 100. So, 3% becomes 0.03.
-
Since the area is decreasing each year, we subtract the decrease from 1. So, 1 - 0.03 = 0.97. This is the annual rate of decrease.
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We then raise this rate to the power of the number of years, which is 14 in this case. So, (0.97)^14 = 0.688.
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Finally, we multiply the initial area of the forest by this rate. So, 3600 km^2 * 0.688 = 2476.8 km^2.
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Rounding to the nearest square kilometer, the area of the forest will be approximately 2477 km^2 after 14 years.
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