Answer:
a) 2 significant figures
b) 5 significant figures
c) 5 significant figures
d) 1 significant figures
Step-by-step explanation:
• All non-zero digits are significant.
E.g. - 421 has 3 significant figures.
• Zeros between non-zero digits are significant.
E.g. - 502 has 3 significant figures.
• In a decimal less than 1, all zeros to the left of non-zero digits are not significant.
E.g. - 0.0345 has 3 significant figures.