Answer:
Approximately 11 minutes and a couple of seconds!
Step-by-step explanation:
Let's find out how many minutes it takes her to ride a mile first
50/18 = 2.77777777778
each mile takes 2.77777777778 minutes.
The question asks for the time it would take for her to ride 4 miles, we just have to multiply the time we got by 4.
2.77777777778 x 4 = 11.1111111111
So, it would take Emily around 11 minutes.
tadah!