Nina designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric semicircles are each 3 ft long. Find the total length of wrought iron used to make this structure. Round your answer to the nearest foot.

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Nina designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric semicircles are each 3 ft long. Find the total length of wrought iron used to make this structure. Round your answer to the nearest foot.

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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|dw:1327254778747:dw|
well, arc length = angle * radius; angle seems to be pi and radius is 10 on one and 13 on the other
then count the segments and times it by 3

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Other answers:

10pi + 13pi + 3(11) seems about right
how did you get the 13?
10 + 3 feet more for the space between them
|dw:1327255016852:dw|
but why do you need both 13 pi and 10pi?
you have 2 arches; one is an inner arch with a radius of 10; the other is an exterior arch with a radius of 13 and you got all these little 3 ft sections to keep them apart
the total amount of material has to be the inclusion of the total length
oh ok i get it know thank you!
youre welcome :)

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