Elio makes candles that are 14 cm tall. Each candle burns 8 hours before going out. He is wondering how many hours a 21 cm tall candle can burn for. He assumes that the relationship between the height of a candle and number of hours it burns is proportional. How long can a 21 cm tall candle burn for?

12 hours

Step-by-step explanation:

Create a proportion where x is how long the 21 cm candle can burn for:

=

Cross multiply and solve for x:

14x = 168

x = 12

So, the 21 cm tall candle can burn for 12 hours

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step-by-step explanation:

mark brainliest.