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7 May, 14:03

A certain forest covers an area of 3900 km2. Suppose that each year this area decreases by 4.25%. What will the area be after 15 years? Use the calculator provided and round your answer to the nearest square kilometer.

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  1. 7 May, 15:58
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    The multiplier for decreasing by 4.25% is 0.9575. To get our answer we times the area by the multiplier to the power of the amount of years:

    3900 x 0.9575¹⁵ (it's to the power of 15 because of the fifteen years) = 2033.042km²

    = 2033km² (to the nearest km²)
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