#### The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 x 10-3 are Option 1) 4, 4, 2 Option 2) 5, 1, 2 Option 3) 5, 1, 5 Option 4) 5, 5, 2

1)    23.023 has 5 significant digits

2)     0.0003 has only 1 significant digits as zero to the left of first non zero digit are not significant.

3)    2.1 x 10-3  It has two significant digits

As we learnt earlier in Based on Tip: Leading Zeros

0.543    - three   significant figures

0.069    - two  significant figures

0.002    -one significant figure

and Based on Tip: Exponential rotation

1.32 X10-2    -three significant figures

Option 1)

4, 4, 2

It is an in incorrect option

Option 2)

5, 1, 2

It is the correct option.

Option 3)

5, 1, 5

It is an incorrect option.

Option 4)

5, 5, 2

It is an incorrect option.

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23.023 have 5

0.0003 have 1

2.1×10 power -3 = 0.021 have 2

5 , 1 , 2 are the significant figures