Bob:
Distance : 70 miles
Speed : 50 miles per hour
speed = Distance / time
time = Distance / speed
Replacing:
Time = 70 / 50 = 1.4 hours
Latoya:
Distance form her house to the stadium = 60 miles
Speed = 40 mph
time = 60 /40 = 1.5 hours
1.4 (Bob) < 1.5 (LAtoya)
Since Bob spent less time, He got to the stadium first