The area of the washer will be the area of the smaller circle SUBTRACTED from the area of the larger circle.
Area of a circle = pi * r^2 where r is your radius (which is half the diameter).
Larger circle area = pi *(diameter/2) ^2.
Smaller circle area = pi * (13.2/2)^2 = pi * 6.6^2 = 136.8484....
So...the area of the washer = larger circle area - 136.4848...
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C might be the answer, I guesss
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26
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to get from -6 to a 0, you add 6. 0+20 is 20, so that is how you get it
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I hope this has Helped :)
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For the length I think you meant 32, and if you did it is $14.40
If not and you meant length of 2 it is $0.90
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