Question

Write 0.00021 correct to 1 significant figure

Answer 1

0.0002.

Explanation:

The first significant figure is 2 and since 1 is the second significant figure ( 1 is < 5) the 2 is retained.

Answer 2

0.0002

Explanation:

0.00021 is a 2 significant figure .after the decimal point the zero can be counted as a significant figure or not ,it depends