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both 40 and 400 have one because there is no "." the 0.7000 has four SF because you know that the first three digits after the seven are exact while the last zero could be rounded. the concept is a little tough to get but once you do its pretty simple.

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2

It could be 3. The only way to be sure is to use scientific notation.

6.4x102 is two significant figures

6.40x102 is three significant figures

One - the trailing zeros are not significant.

There are two significant figures in 400 mm.

4,400 has two significant figures.

1 significant figure.

1 significant figure.

1 of them.

4 of them.

One

Q: How many significant figures in 400 mm?

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3 significant figures.

300 mm is equivalent to 11.81 inches, and 400 mm is equivalent to 15.75 inches. Therefore, 300 x 400 mm is equal to 11.81 x 15.75 inches, which is approximately 186.39 square inches.

There are six significant figures in the measurement of 45.0300 mm. All non-zero digits and zeros between them are significant, as well as any zero to the right of a decimal point.

There are 400 cm in 4000 mm. This is because 1 cm is equal to 10 mm, so to convert mm to cm you divide by 10.

1in = 2.54cm 1cm = 10mm 550mm x 1cm/10mm = 55cm 55cm x 2.54cm/1in = 140in (Rounded to two significant figures.) Direct Conversion Formula 550 mm* 1 in 25.4 mm = 21.65354331 in

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2 significant figures.

There are 3 significant figures in this number.

There are 6 significant figures in this length.

3 significant figures.

It has 2 significant figures. However, the fact that it is given as 2300 mm and not as 230 cm suggests that it is, in fact significant to 4 figures.

4

2 of them.

4. The zeroes to the left are not significant, the zero to the right, is.

111.009 mm rounded off to four significant figures is 111.0

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

3 of them.

110.1mm