4
3 significants
significant figures.
Length And Width
3 there is 4, 5, and the 0 in between. The two trailing zeros are not measured as significant figures unless there is a decimal point or further significant figures (40505 has 5 sig figs, 40500.0 has 6 4.05x10^3 has 3 etc.)
4 significant figures.
4
3 significants
All three of them are significant figures
They can be measured by their linear measures in three orthogonal directions.
The simple rule is: no more significant figures than the least accurate of the values in the computation. For multiplication and division, the result should have as many significant figures as the measured number with the smallest number of significant figures. For addition and subtraction, the result should have as many decimal places as the measured number with the smallest number of decimal places. (Rounding off can be tricky, but that would be another thread)
Area; this is often measured in square meters, or square centimeters.
significant figures.
Length And Width
28.71
3 there is 4, 5, and the 0 in between. The two trailing zeros are not measured as significant figures unless there is a decimal point or further significant figures (40505 has 5 sig figs, 40500.0 has 6 4.05x10^3 has 3 etc.)
3.774 is to 4 significant figures (count them)