What is the value of the number $96378$ when rounded off to two significant figures?

Find the area of a rectangle with dimensions $1.23 \ cm$ and $2.345 \ cm$ in $cm^2$.

Which of the following measurements is the most accurate?

If $N_A, N_B$,and $N_C$ are the number of significant figures in $A=0.001204 \ m$,$B=43120000 \ m$,and $C=1.200 \ m$ respectively,then:

The number of significant figures in $0.03240$ is

An object of mass $m = 3.513 \ kg$ moves along the $x$-axis with a velocity of $5.00 \ ms^{-1}$. The magnitude of its momentum can be recorded as $...... \ kg \ ms^{-1}$.