101.5 has four significant figures.
Three significant figures.
Three. All nonzero numbers are significant, and any zeros in between significant numbers are significant.
77,900 has three significant figures.
Three significant figures.3 of them.
All three digits are significant for 305.
Three
4650.
Three of them
There are three of them
Three of them.
Three.
Three. Significant figures (or numbers) are determined by counting how many digits above zero appear in a number.