please answer 99 points

Hey there Javin!

The formula the we would use is. . . 

[tex]d=2r[/tex]

This would mean that we would just multiply what ever is the diameter.

So, in this case, this coin has the diameter of 22, we do [tex](22*2)[/tex] and that would give us 44. (but that is not the answer quite yet).
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The formula of a Circle is [tex]A= \pi r^2[/tex]  We now know that the diameter is 22.So this would mean that the radius is half of this, which is 11.

Plug int he number's in the formula, 3.14*11^2 ≈ 379.94

Your correct answer would be . . . 

[tex]\boxed{\boxed{379.94}}[/tex]

Hope this helps.
~Jurgen