Question

Determine the number of significant figure in the following.
$3.64\times {10}^{45}$ kg.

Answer 1

The given quantity is $3.64\ast {10}^{45}kg$.

Here, the power of 10 is irrelevant for the determination of significant figures. Hence, all digits i.e.,2,6 and 4 are significant figures.

$\therefore$ There are 3 significant figures.