Question

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Answer 1

Explanation:

First let's find the circle without the gray area. We would have:

`\pi r^2=\pi 36^2=\pi1296`

Next let's find the area of the circle with the gray area. We would have:

`\pi r^2=\pi50^2=\pi2500`

Now we subtract and get:

`(2500-1296)\pi=\boxed{1204\pi}`

HOPE THIS HELPS