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27. Massachusetts has 4230 miles of rivers. Which of the following measures is closest to the length, in kilometers, of the rivers in Massachusetts? (1 mile = 1.609 kilometers)
29. Samir made a pattern by starting with 9 and repeatedly dividing by 3, as shown below.9 , 3 , 1, 1/3 , ? , 1/27 , . . .What number belongs in the position aindicated by the question mark?
30. Mr. Lee has one mathematics class with 16 students and one with 24 students. He wants to divide each class into groups with the same number of students in each group. What is the greatest number of students Mr. Lee can have in each group?