Question

if he run 5.9miles each day , about how much does he run every month

Answer 1

For 30 days 177 miles
For 31 days 182.9
For 29 days 171.1
For 28 days 165.2

Answer 2

We know one thing, 5.9 miles is the amount per day.

Now, to solve a problem like this, we need to determine how many days in a month. 

Well, usually, the majority amount of months have 30 days. So I will therefore use 30 days to solve.

5.9*30 = 177 miles

But wait....since it says 'about', it means that we must put this sign :-  ≈ 

Final answer:- He runs about 177 miles a month.