Because 58 is closer to 100 than 0
another example you can see is if it was 10058 and you were asked to round to the nearest hundred you can say 10100
We have

And we want

Another way to read it is

It should be clear that the solution is 
The answer is 30 I believe
Answer:
get rekt
Step-by-step explanation:
Total mass = 6.08 x 10^23 * 1.67 x 10^-24 = 1.01536