Answer:
Rylie can bike 70.58 miles in an hour.
Explanation:
With the information provided, you can use a rule of three to find the miles that Rylie can bike in an hour given that she bikes 847 miles every 12 hours:
847 miles → 12 hours
x ← 1 hour
x=(847*1)/12
x=70.58
According to this, the answer is that Rylie can bike 70.58 miles in an hour.