A12-inch candle is lit and steadily burns until it is burned out. as the burned length of the candle increases from 4 to 7.5 inches, the remaining length of the candle varies from inches to inches. suppose b represents the burned length of the candle in inches (or the number of inches that have burned from the candle since it was lit). write an expression in terms of b that represents the remaining length of the candle (in inches).