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The diameter of this semicircle is 15 feet. One bag of mulch spreads 6 square feet. How much mulch will be needed for this area?
Wiki User
∙ 14y ago
The area of a circle is the product of the square of the radius squared and the number pi. The area of a semicircle is half the area of the corresponding circle. The diameter is twice the radius. Therefore, the area of this semicircle is pi(15/2)2/2 = 8 X 101 square feet, to the justified number of significant digits -- only one, since the value 6 has only one. At 6 square feet of mulch per bag, over 13 bags of mulch will be needed; therefore, 14 bags should be available.
Wiki User
∙ 14y ago
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Needs more information!
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