#### Answer

$\frac{1}{4}$.

#### Work Step by Step

Since the curvature of a circle of radius $r$ is $\frac{1}{r}$, then the curvature of a circle of radius $4$ is $\frac{1}{4}$.

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Published by
W. H. Freeman

ISBN 10:
1464125260

ISBN 13:
978-1-46412-526-3

$\frac{1}{4}$.

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