Significant figures
A
For 9 862, we have 4 significant figures. We want to round it so it has just one:
we have two possibilities:
9 000
or
10 000
because 9862 is in between 9 000 and 10 000 and they both have just one significant figure.
Since 9862 is nearer to 10 000 than to 9 000, then
Answer: 9 862 ≅ 10 000
B
For 0.050 706 we have 5 significant figures (we count from 5). We want to round it so it has just two:
we have two possibilities:
0.050
or
0.051
because 0.050 706 is in between 0.050 and 0.051 and they both have just two significant figure.
Since 0.050 706 is nearer to 0.051 than to 0.050 , then
Answer: 0.050 706 ≅ 0.051