Which shows how you can check that 2/3 divided by 7/8 = 16/21

A. 7/8 times 16/21 = 2/3

B. 16/21 divided by 7/8=2/3

C. 16/21 divided by 2/3 = 7/8

D. 8/7 times 16/21=2/3

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1) A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly? (round to the nearest whole number) 87

2x^-2/5 write in radical form

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The time it takes to wash all the windows on a large building W (x) varies inversely with the number of workers assigned to the job x. It takes 6 hours to complete the job when 4 workers are assigned to it.