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When a factory operates from 6 AM to 6 PM, its total fuel consumption varies according to the formula f (t) = 0.8t - 0.210.4

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When a factory operates from 6 AM to 6 PM, its total fuel consumption varies according to the formula f (t) = 0.8t - 0.210.4 + 27, where t is the time in hours after 6 AM and f (t) is the number of barrels of fuel oil. Step 1 of 3 : How much fuel is consumed by 3 PM? Round your answer to 2 decimal places

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