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Mathematics 18 Online
OpenStudy (anonymous):

Help with this please? http://puu.sh/7kiA8.png Answer?

OpenStudy (mathstudent55):

Look up the formulas for area and circumference of a circle. Keep in mind that most of the time, these formulas are given in terms of the radius of the circle, and your problem gives you the diameter. To find the radius, divide the diameter by 2.

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