1. Juan's airplane trip took 4.2 hours. For one-half of that time, the airplane flew at a speed of 500 miles per hour, and for the rest of the time, it flew at a speed of 680 miles per hour. What distance did Juan travel?
2. Nancy travels in an airplane a distance of 3300 km. For one-third of the distance, the airplane flies at a speed of 912 km/h, and for the rest of the distance, it flies at a speed of 696 km/h. How long does the trip take?
3. Sarah roller skates for 2 3/4 hours with a constant speed of 6 km/h and then for another 2 hours with a constant speed of 24 km/h. What distance did she go?
4. An airplane flies 1312 miles with a constant speed of 492 mph and another 1914 miles with a constant speed of 696 mph. What is its average speed for the total trip?
5. Mary rides her horse with a constant speed of 8 miles per hour. How far can she travel in 210 minutes?
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