Ana bikes for 5.5 hours. She covers a distance of 57.75 mi. Assuming she bikes at a constant speed, how fast was Ana biking?
A 5.5 mi/h
B 7.5 mi/h
C 9.5 mi/h
D 10.5 mi/h
A 5.5 mi/h
B 7.5 mi/h
C 9.5 mi/h
D 10.5 mi/h