100 is already rounded to one significant figure.
It then is 40000 to one significant figure
It is 10
100
That depends on whether the dot before the question mark is a period or a decimal point. 100 has one significant figure. 100. has three significant figures.
There is just one significant figure.
200 Explanation: 2 is the one significant figure. The zeros are not significant. Round up because it is closer to 200 than to 100.
It then is 40000 to one significant figure
0.4
It is 10
0.04
0.04
100
146 rounded to one significant figure becomes 100
You round to the nearest tens place. In this case, 738 rounded to one significant figure is 700.
That depends on whether the dot before the question mark is a period or a decimal point. 100 has one significant figure. 100. has three significant figures.
100
There is just one significant figure.