If the diameter of a circle is $1.3 \cdot 10^{- 12}$ $1.3*10^-12$ meters, then what is its radius?

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If the diameter of a circle is $1.3 \cdot 10^{- 12}$ $1.3*10^-12$ meters, then what is its radius?

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Answer 1 · 2018-04-19T12:40:20

The radius is half the diameter,
$r = \frac{1}{2} (1.3 \cdot 10^{- 12})$ $r = 1/2 (1.3 cdot 10^{-12})$ $= 0.65 \cdot 10^{- 12} = 6.5 \cdot 10^{- 13}$ $= 0.65 cdot 10^{-12} = 6.5 cdot 10^{-13}$ meters

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If the diameter of a circle is $1.3 \cdot 10^{- 12}$ $1.3*10^-12$ meters, then what is its radius?

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