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Mathematics, 22.09.2019 12:10 lifeofabe214
Loft insulation reduces annual heating costs by 20%. after he insulated his loft, curtleys annual heating cost was £520. work out curtleys 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, curtleys annual he...
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