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• two students leave the same school at the same time to walk home. they both walk at 3 km/h for 15 minutes and then 2 km/h for 5 minutes. however, they do not end up at the same house. why did the two students not end up at the same house? they had the same velocity. they had different velocities. they had the same rate of speed. they had a different rate of speed.
  
• read the sentence. mustufa ran the 100-meter and 200-meter races but the one he had trained for the hardest was the 400-meter competition. which is the best revision of this sentence? mustufa ran the 100-meter and 200-meter races (but the one he had trained for the hardest) was the 400-meter competition. mustufa ran the 100-meter and 200-meter races but the one he had trained for the hardest (was the 400-meter) competition. mustufa ran the 100-meter and 200-meter races but (the one he had trained for the hardest was the 400-meter competition). mustufa ran the 100-meter and 200-meter races (but the one he had trained for the hardest was the 400-meter competition).
  
• who controls the security at the museum of natural history? dr. sabato the security guard the government the agency
  
• which of the following was not a result of the cuban missile crisis? an easing of tensions in the cold war the opening of the ""hot line"" between moscow and washington a large increase in the number of refugees from cuba to the united states a treaty between the u.s. and the u.s.s.r. to end nuclear tests in the atmosphere
  
• which addition expression has the sum 8 – 3i ? (9 + 2i) + (1 – i) (9 + 4i) + (–1 – 7i) (7 + 2i) + (1 – i) (7 + 4i) + (–1 – 7i)
  
• which issues slowed the speed of industrialization in some countries? check all that apply. limited government financing a lack of resources economic problems unskilled workers political instability
  
• what do you think would be some of the challenges in collecting and preserving impressions? why?
  
• many students tend to develop illnesses in the days before final exams. a psychologist who notes that students become stressed as well during this time may attempt to claim that the reason for the increase in student illness is that __________. stress causes college students to make bad decisions during stressful times research has found that stress may improve immune functioning college students naturally become ill easier than other individuals research has found that stress can suppress immune functioning
  
• the maori consider the treaty of waitangi unfair because __________.a.maori gained british protectionb.maori obtained property ownership rightsc.maori received rights as british subjectsd.maori and english versions of the treaty didn't match
  
• how can we increase the rate of collisions between the reactants in this reaction? mg + 2hcl → mgcl2 + h2 a. increase the concentration of h2 in the reaction mixture. b. decrease the temperature of the reactants in the reaction mixture. c. increase the concentration of mg in the reaction mixture. d. decrease the temperature of the entire reaction mixture. e. decrease the concentration of hcl in the reaction mixture.