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OpenStudy (anonymous):
What is the difference in the areas of a circle with diameter 4m and a circle with diameter 6m?
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OpenStudy (anonymous):
What's the equation for the area of a circle?
OpenStudy (anonymous):
|dw:1376330701265:dw|A=
OpenStudy (anonymous):
yes For the circle with diameter 4m, what is r?
OpenStudy (anonymous):
2m
OpenStudy (anonymous):
yes. so the area of that circle is...
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OpenStudy (anonymous):
A= 12.566
OpenStudy (anonymous):
yes. same thing for the other circle. when you see "difference" think "minus". Subtract the smaller area from the larger one and you'll have your answer.
OpenStudy (anonymous):
28.274-12.566=15.708
OpenStudy (anonymous):
sounds about right.
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