4650.
4647 to 3 s.f. is 4650
4647 is 4600 to 2 sig fig.
Three significant figures.
Three. All nonzero numbers are significant, and any zeros in between significant numbers are significant.
Three
Three.
Three of them
There are three of them
Three of them.
Three. Significant figures (or numbers) are determined by counting how many digits above zero appear in a number.
The measurement of 29.46 cm when rounded to three significant numbers becomes 29.5 cm
All three digits are significant for 305.