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OpenStudy (anonymous):
check my answer? find the area of the annulus in the circles (one with radius 4 cm and the other with radius 11 cm) shown below. leave answer in pi form. My answer: 105 pi
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OpenStudy (anonymous):
OpenStudy (sdfgsdfgs):
good job! 105 pi is the right anw :)
OpenStudy (anonymous):
this is the right answer great job btw
OpenStudy (anonymous):
wooohoo :)
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