Question

Write the number of significant digits in:

$5.16\times {10}^8$.

• A. $3$
• B. $1$
• C. $2$
• D. $9$

Answer 1

The correct option is A $3$

$5.16\times {10}^8$
There are $3$ significant figures. When a number is written in scientific notation, only significant figures are placed into the numerical portion.