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Mathematics 23 Online
OpenStudy (anonymous):

PLEASE HELP! WILL GIVE MEDAL! The ideal length of a certain nail is 20mm. The actual length can vary from the ideal by at most 0.4mm . Find the range of acceptable lengths of the nail.

OpenStudy (anonymous):

\[20 \pm 0.4\] range is 19.6 to 20.4

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