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July 1, 2015

Homework Help: math

Posted by Anonymous on Tuesday, July 12, 2011 at 7:59am.

After working 4 hours, Frank has made 21 machine parts. At the same rate, how many parts can he make in 7 hours?


A) (21/4)*7
B) 7(21)
C) 7(4) /21
D) 7(4)(21)

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