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Mathematics 11 Online
OpenStudy (anonymous):

A student needs to make a circular cardboard piece with an area between 154 square inches and 616 square inches. The function f(r) relates the area of the cardboard piece, in square inches, to the radius r in inches. Which of the following shows a reasonable domain for f(r)?

OpenStudy (anonymous):

7 < r < 14 154 < r < 616 all positive integers less than 7 all positive integers between 14 and 154

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