Question

Write the significant digits of 178.43 cm^2 and 0.00172 m​

Answer 1

$\huge\mathfrak\purple{Answer}$

178.43 = 5 significant figures

0.00172 = 3 significant figures

$\huge\mathfrak\purple{More \: Info}$

The rules followed to count the number of significant figures are as follows

⭐All non zero digits are significant.

All the zeros between two non-zero digits are significant.

⭐Starting zeros are not significant.

⭐Trailing zeros in a non-decimal number are not significant.

⭐Trailing zeros in a decimal number are significant.

⭐In exponential notation, the numerical portion gives the number of significant figures.

Answer 2

Answer:

The rules followed to count the number of significant figures are as follows

⭐All non zero digits are significant.

All the zeros between two non-zero digits are significant.

⭐Starting zeros are not significant.

⭐Trailing zeros in a non-decimal number are not significant.

⭐Trailing zeros in a decimal number are significant.

⭐In exponential notation, the numerical portion gives the number of significant figures

$hope it helps ✔︎✔️$