How many significant figures in 400 mm?

Answer 1

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.

Answer 2

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

Answer 3

One - the trailing zeros are not significant.

Answer 4

There are two significant figures in 400 mm.

Answer 5

4,400 has two significant figures.

Answer 6

1 significant figure.

Answer 7

1 significant figure.

Answer 8

1 of them.

Answer 9

4 of them.

Answer 10

One