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# maths help needed watch

1. write down the upper bound of each of these numbers when written to the number of significant figures shown.

68 ( 2 significant figures )

3.14 ( 3 significant figures )

370 (2 significant figures )

2.718 ( 4 signifcant figures )

2. (Original post by mathusa12)
write down the upper bound of each of these numbers when written to the number of significant figures shown.

68 ( 2 significant figures )

3.14 ( 3 significant figures )

370 (2 significant figures )

2.718 ( 4 signifcant figures )

What rounds down to make 68, but is less than 69?
3. sorry but i dont get this can your show me how you work this out
4. If it is 68 to 2sf, then the real answer could be anything from 67.5 to 68.499999999... So instead the upper bound is written as 68.5 and the lower bound is 67.5 (:

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5. It's the same with 3.14 to 3sf, the real value could be anything from 3.135 to 3.145 (:

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Updated: April 12, 2013
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