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OpenStudy (anonymous):
What is the area of a circle with diameter 10 inches? 25 pi in 2 20 pi in 2 5 pi in 2 100 pi in 2
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OpenStudy (anonymous):
area of a circle is \[\pi r^2\]
OpenStudy (anonymous):
diameter is twice of the radius
OpenStudy (anonymous):
so the r in this question is \[10\div2=5\]
OpenStudy (anonymous):
5 pi in 2
OpenStudy (anonymous):
ok
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