SOLUTION: A sliver of silver measures 2.231mm by 4.0mm. What is the area of the metal using the correct number of significant figures?

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Question 1124183: A sliver of silver measures 2.231mm by 4.0mm. What is the area of the metal using the correct number of significant figures?
Answer by CubeyThePenguin(3113) About Me  (Show Source):
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In multiplication, the result has the same number of significant figures as the least accurate measurement.

2.231 * 4.0 = 8.9 mm^2