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I have to find the area of the shaded region in the figure above and answer using an exact and approximate answer

I have to find the area of the shaded region in the figure above and answer using an exact and approximate answer class=

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thebecks

Answer:

3925 units²

Step-by-step explanation:

area of larger circle = πr² = (3.14)(250²) = 196,250

area of smaller circle = πr² = (3.14)(200²) = 125,600

area of full donut = 196,250 - 125,600 = 70,650

20/360 = 1/18 of full donut

1/18(70,650) = 3925 units²

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