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10 July, 21:28

A company produces individually wrapped spherical cookies. The minimum amount of wrapping material needed to cover a cookie, assuming no edges overlap, is 314 square inches. What is the diameter of one cookie? (Use 3.14 for the value of π.)

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  1. 10 July, 21:29
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    The surface area of a sphere is 4pi*r^2. If this total surface area is equal to 314 square inches:4pi*r^2 = 314r^2 = 314 / (4*3.14) = 25r = 5d = 10 inches
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