2
2300.m has four significant figures.
Two of them
It has 2 significant figures. However, the fact that it is given as 2300 mm and not as 230 cm suggests that it is, in fact significant to 4 figures.
Two significant figures (2,3).
The number 2300 has two significant figures if it is written without a decimal point. If it is expressed as 2300. (with a decimal), it would have four significant figures. The presence of a decimal indicates that the trailing zeros are significant. Thus, the context of the number's presentation determines the count of significant figures.
Five significant figures.
4 significant figures.
The value 24.503 has 5 significant figures.
Rice crispy squares? A lot! --- but --- 2300 sq ft would be 2300 squares, each of which is 1 ft by 1 ft; or one square which is sqRt( 2300 ) ft by sqRt( 2300 ) ft. - where sqRt( 2300 ) is the square root of 2300, which is, to five significant figures, 47.958.
2 significant figures.
5 of them.
1