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anonymous
 4 years ago
A contractor has installed a silt fence around an area that is semicircular and level to prevent soil from the construction site entering nearby streams. The diameter of the semicircle is 1200 feet. How many linear feet of fence does the contractor need to use to enclose the area?
anonymous
 4 years ago
A contractor has installed a silt fence around an area that is semicircular and level to prevent soil from the construction site entering nearby streams. The diameter of the semicircle is 1200 feet. How many linear feet of fence does the contractor need to use to enclose the area?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0and how many acres are within the enclosed by the fence?

Mertsj
 4 years ago
Best ResponseYou've already chosen the best response.0Circumference of the semicircle is 1/2 pi d or 600 pi or 1885.0 ft. The Area of the semicircle is 1/2 pi r^2 or 1/2 pi (600)^2 or 565486.7 square feet. But one acre is 43,560 sq ft. so 565486.7 sq ft = 13.0 acres

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0circumference of the circle is\[C=2\pi r\]since it's a semi circle, the formula will be\[C=\pi r\] given diameter measure is 1200 feet. therefor r=600 substitute to the formula; \[C=\pi r\]\[C=\pi 600\]therefor; it is approximately 1884.96 feet
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