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of 7 please answer quick

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

If there are 3.281 feet in 1 meter, how many inches are in one centimeter