1. speed = 7.6 mph
time = 3.5 hr
distance = speed x time = 7.6 x 3.5 m/hr
=26.6
2. time = 15 min = 15/60 hr = .25 hr
distance = 24 miles
speed = distance/time
speed = 96 mile/hr
3. time = 10 min = 10/60 hr = 1/6 hr
distance = 2.4 miles
speed = distance / time = 14.4 m/hr