100 is already rounded to one significant figure.
It then is 40000 to one significant figure
It is 10
Rounded to one significant figure it becomes 40
It is 200 rounded to one significant figure
100 is already rounded to 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
It is 10
0.4
0.04
0.04
You round to the nearest tens place. In this case, 738 rounded to one significant figure is 700.
To round 350 to one sig fig, you will round to the hundreds place. 350 rounds up to 400 which is one sig fig.
It is then 30,000 rounded to 1 significant figure
62 rounded to one significant figure is 60. 57 rounded to one significant figure is 60. 573 rounded to one significant figure is 600. 0.0573 rounded to one significant figure is 0.06. In each of these answers the 6 is the only significant figure.
Oh, dude, one significant figure? That's like saying, "I only care about the first number, the rest can go chill." So, 827 to one significant figure is just 800. You're basically giving it a one-digit makeover and sending it out to impress all the other numbers.