Mathematics, 03.07.2019 17:00 panda6775

Loft insulation reduces annual heating costs by 20%. after he insulated his loft, curtley's annual heating cost was £520. work out wha t curtley's annual heating cost would have been if he had not insulated his loft.

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Loft insulation reduces annual heating costs by 20%. after he insulated his loft, curtley's annual h...