The two numbers mentioned in the question have four significant figures (often called significant digits). If you wish to check your knowledge of sig-digs, check out the following link: http://science.widener.edu/svb/tutorial/sigfigures.html
There is one significant figure, because the other zeros are place holders.
Just one: the 1.
.001 has one significant figure.
One - the zeros are placeholders.
1 of them.
Just the 1.
1
4 significant figures.
There are 3 significant figures in 94.2.
Trailing zeros ALWAYS count as significant figures, so 700.0 would have 4 significant figures.
There are 4 of them
5 significant figures
there is one significant figure in 001 because 0's only count as significant figures when they are after a whole number and there is a decimal point. ex. there are three sig figs in 100. 1.00 and 10.0
15 000 894 written with 5 significant figures is 15 001 000, as the 894 rounds up to the nearest significant figure. 1.5001*10^7
001 has one significant digit, so the answer can only have one. 1.2 x 001 = 1
4 significant figures.
There are 3 significant figures in 94.2.
There are 4 significant figures in 0.0032. Seems to be only 2 significant figures in this number.
There is one significant figure in the number .001. Leading zeroes, which only serve to indicate the position of the decimal, are never significant.
There are four significant figures in 0.1111.
20.2 has three significant figures.
Trailing zeros ALWAYS count as significant figures, so 700.0 would have 4 significant figures.
There are two significant figures in 0.025.
5 significant figures.