Here, we want to find the total number of miles Hailey walked last month
We have two parts here
Initially, 6 hours per week for 3 weeks
The number of miles walked here at 3.5 miles per hour is;
Secondly, we have the second as 4 hours in a week at a rate that is one-half the regular
One-half the regular is;
So, we have the total as;