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Thiobacillus is a acidophilic and chemolithoautotrophic bacteria that obtain its energy from the oxidation of Ferrous ions and reduced sulfur compounds
?% of 24% of 1200 + 12 × 11 = 204
7(3/6) of 534 + 262 = 61800 - ?
(21 X 5) + ? = (480 - 120) ÷ 3
12% of 10% of 15% of 5000 + (12 x 15) = ?
√1764 + 35 × 8 + 39 = ?2
(30 × 0.80)⁴ ÷ (2160 ÷ 60)⁴ × (54 × 16)⁴ = (6 × 4)?+5
√121 + √961− √289 =?2
120 × 195 ÷ 13 - ? = 162
63 × 4 = ?2 – 1620 ÷ 5
140% of 75 + 152 - 160 = ?
