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OpenStudy (theamazing.phan):
if the radius, r, is doubled, how does it affect the area of a circle?
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OpenStudy (skyvoltage):
MARKIPLIER!!!!!!!!!
Vocaloid (vocaloid):
hint: A = pi * r^2 if we double r we get A = pi * (2r)^2 = pi * 4 * r^2 so what changes?
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