Short Answer
David makes candles that are 7cm tall. Each candle burns 3 hours before going out. He is wondering how many hours a 21cm tall candle can burn for. Assuming that the relationship between the height of a candle and number of hours it burns is proportional; determine the proportion that can be used to model this scenario and how long a 21cm tall candle can burn for.
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7 : 3 = 21...View Answer
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Correct Answer:
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