It is _____ to fly an airplane at three thousand miles an hour.
The depth over a shallow patch,()about 1.5 miles southeastward of Nanshan Tou lighthouse,reduces to 8 meters.
An airplane traveled at a speed of 600 miles per hour for 90 minutes. How far did the airplane travel?
Ellen takes a trip that is y miles long in total, where y > 20. She travels the first 15 miles at an average speed of 30 miles per hour and the rest of the trip at an average speed of 40 miles per hour. Which of the following represents the total time of the trip, in hours?
On a certain map, 10 miles is represented by 1.5 centimeters. What is the distance on the map that represents 40 miles?
On a map that is drawn to scale, two towns that are x miles apart are represented as being 2 inches apart. If two other towns are x+4 miles apart, how many inches apart would they be on the same map?
The rubbish should be collected on the poop deck and ()(处理) 25 miles off the shore.
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When visibility is 20 nautical miles, we say that visibility is().
The depth()a shallow patch,lying about 1.3 miles southeastward of Nanshan Tou lighthouse reduces to about 6.1 meters.