julie ran eight laps around her school's quarter-mile track in 18 minutes. her average velocity was ___________ m/s.
18 minutes = 18 * 60 = 1080 sec
Distance = (1/4) * 8 = 2 miles
Convert miles to meters
1 mile = 1609.344 m
So
2 *1609.344 m / 1080 sec ≈ 2.98 m / s
8 laps x 1/4 mi/lap = 2 miles
2 miles = 3219 meters
18 minutes = 1080 s
3219 m / 1080 s = ~~ 2.98 m/s
+229 
+36916 
