Three.
0.999 All leading zeros are non-significant.
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 ■
Integers ending in 0 are ambiguous cases. The measurement could be accurate to the units digit and in that case all three digits are significant. But is could be accurate to the nearest ten, in which case, only the first two digits are significant.
Three significant digits.
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
The measurement of 29.46 cm when rounded to three significant numbers becomes 29.5 cm
Three.
Three.
31500
0.0570
16.3
6.71 is 6.7050 is rounded to three significant figures.
Three.
3.738mL, when rounded to three significant figures, is 3.74mL
Three significant figures would be 29.5cm.