Question

The number of significant figures in the numbers $4.8000\times {10}^4$ and $48000.50$ are respectively

• A. $5$ and $6$
• B. $5$ and $7$
• C. $2$ and $7$
• D. $2$ and $6$

Answer 1

The correct option is B $5$ and $7$

The number of significant figure in $4.8000\times {10}^4$ is $5$ (zeros on right after decimal are counted while zeros in powers of 10 are not counted).
The number of significant figure in $48000.50$ is $7$ (all the zeros between two non-zero digits are significant).