State the number of significant figures present in the following expressions:4.000m

What is meant by significant figures? State the number of significant figures present in the following expressions:-0.0036g

State the number of significant figure in the following. .007 m^2

State the number of significant figure in the following. 6.320J

State the number of significant figure in the following. .23gm

State the number of significant figure in the following. .0006032 m^2

State the number of significant figures in the, following: 0.0006032 m^2

State the number of significant figures in the, following: 6..320 N m^(-2)

What is the number of significant figures in 0.00650

State the number of significant figures in the, following: 0.2370 g cm^(-3)

State the number of significant figures in the, following: 2.64 xx 10^(24) kg