9 10 x 1 6 July 8, 2019 16 32 64 128 9 10 x 1 6 as a fraction Contaminants 1 9 x 10 * 6 cfu l 10 1 7 x 9 6 7 1 9 x 10 * 6 cfu l Colony count 1 9 x 10 * 6 cfu l 8 x 9 y 1 10 x 6 y 7 9 x 1 6 6 x 9/10