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OpenStudy (anonymous):
Which of the following measurements is expressed to three significant figures? 0.007 m 7077 mg 7.30 x 10–7 km 0.070 mm
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OpenStudy (stormfire1):
7.30 x 10-7 km
OpenStudy (stormfire1):
Leading and placeholder zeros do not count as significant figures..which rules out the first and last choices. 7077 is ambiguous so you assume that it has 4 significant figures.
OpenStudy (anonymous):
7.30x10^-7km is that correct?
OpenStudy (stormfire1):
Yes
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