In order for a button to fit through its buttonhole, the hole needs to be the size of the button's diameter. What size buttonhole is needed for a button with a circumference of 9.42 centimeters? A. 3 centimeters B. 6 centimeters C. 4 centimeters D. 1.5 centimeters

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Formula for the circumference:  C = π d Use the estimate of 3.14 for π: 9.42 = 3.14 d  Divide both sides by 3.14: d = 9.42 / 3.14 They have very conveniently given you a round number: d = 3  so your answer is A

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