Help me for number 20 and 21 and also show work

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asked Feb 15, 2018 202k views

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Eneski · Answer 1 · 2018-02-20T21:17:10+0000

32.4*0.69=22.149

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45=3*3*5, 63=3*3*7 The greatest common factor is the product of shared primes of the numbers prime factorization. In this case 3*3=9 is the product of shared primes so the greatest common factor is 9

Help me for number 20 and 21 and also show work

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