Question 5 A lighted candle burns outr according to the equation y'(1) -ky (1) where is the length (in inches) of the candle at any given time / (in hours). An 8-inch candle is reduced to half- length after 10 hours. Estimate the length of the candle after 7 hours. O 2.8 inches O 5.6 inches 4.9 inches O 3.5 inches

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