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13 October, 08:45

Dg's plumbing and heating charges $50 plus $70 per hour for emergency service. bill remembers being billed just over $450 for an emergency call. how long to the nearest hour was the plumber at bill's house?

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  1. 13 October, 09:05
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    50 + 70h = 450

    70h = 450 - 50

    70h = 400

    h = 400/70

    h = 5.71 ... to the nearest hr, it would be 6 hrs <=
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