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The rule when rounding off numbers is "If the first figure to be discarded is 5 or more then the previous figure is increased by 1".
The first figure to be discarded is '6' and as this is greater than 5 then the previous figure (4) is increased by 1 (to 5).
29.46 when rounded off to three significant figures is 29.5.
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Earn +20 ptsQ: What is the measurement of 29.46 cm when rounded to three significant figures?
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