Mary and jim decided to travel to europe one a summer the jet flew at an average rate of 550 mph and covered 3437.5 miles how long did the flight take

One drawback of voluntary trade is that it a. requires two groups to use a common language b. can make one group dependent upon another for necessary goods c. doesn't occur unless there is a shortage of goods for at least one group d. forces groups to rely on themselves to produce all the goods they need