Three. All non-zero digits are significant, all zeroes between other digits, and all digits to the right of the decimal. The reason for this is that if this is rounded off, it apparently is rounded off to the nearest tenth, otherwise the tenth place would not be shown. if it were rounded off to the unit, it would read 39, not 39.0 ■
9,990 to 3 s.f., or 9,990 (3 s.f.) or 9,990
Three significant digits.
1,040 to 3 s.f., or 1,040 (3 s.f.) or 1,040.
Three - zeros between significant digits are significant.
323.565 rounded to three significant digits is 323.56
2.99 rounded to three significant digits is 2.96 2.99 rounded to two significant digits is 3.0
31500
0.0570
16.3
6.71 is 6.7050 is rounded to three significant figures.
Three. All non-zero digits are significant, all zeroes between other digits, and all digits to the right of the decimal. The reason for this is that if this is rounded off, it apparently is rounded off to the nearest tenth, otherwise the tenth place would not be shown. if it were rounded off to the unit, it would read 39, not 39.0 ■
9,990 to 3 s.f., or 9,990 (3 s.f.) or 9,990
0.00909 has three significant digits.
Three significant digits.
There are three significant digits in 3.56.
1,040 to 3 s.f., or 1,040 (3 s.f.) or 1,040.