Question

The number of significant figure In the numbers $4.8000\times {10}^4$ and $48000.50$ are respectively then

• 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 $7$.

If any number has more than one digit after decimal place are significant. Power of 10 does not affect number of significant figures.

$4.8000\times {10}^4=5$ significant figure $(4,8,0,0,0)$

$48000.50=7$ significant figure $(4,8,0,0,0,5,0)$