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Significant Figures

Rule 1 : Zeros must be kept to show the position of the decimal point.

Rule 2 : If the first figure to be discarded is 5 or more, the previous figure is increased by 1.

Rule 3 : Zeros must be retained to indicate that 0 is a significant figure.

0.004738265 : - Rule 1 the part of the number 0.00 must be kept.

The third significant figure is therefore 0.0047?

Rule 2 the first number to be discarded is 8 therefore the previous figure is increased by 1. (3 is increased to 4)

The number to 3sf is 0.00474

Q: Round 0.004738265 to 3 significant figures?

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17.9867 to 3 significant figures is 18.0

It is 1570000 rounded to 3 significant figures

The number 10.989 rounded to 3 significant figures is 11.0

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5.00x10^6

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17.9867 to 3 significant figures is 18.0

1100 to 3 significant figures is 1.10e3

2808 into 3 significant figures is 2810

0.0000004799 into 3 significant figures is 4.80e-7

1.557727 to 3 significant figures afer the decimal point is = 1.558

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e A number that has only 1 significant figure can't be rounded to 3 significant figures

It is 1570000 rounded to 3 significant figures

0.000039 as you have to round it up. 3 and 8 are the significant figures but as you must round up, the answer becomes 0.000039.

The number 10.989 rounded to 3 significant figures is 11.0

79,700

22.4