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OpenStudy (anonymous):
i got 9 but i think i did something wrong.. someone help plz. Determine the diameter of a circle that has an area of 18 cm2. If necessary round answers to nearest tenth
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OpenStudy (btaylor):
A = πr^2 18 = πr^2 r^2 = 18/π \[r = \sqrt{\frac{18}{\pi}}\]
OpenStudy (anonymous):
2.39 ?
OpenStudy (anonymous):
or 5.7 ? @BTaylor
OpenStudy (btaylor):
it is 2.39
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