(A) To convert temperature from Kelvin $(K)$ to Celsius $(^\circ C)$,use the formula: $^\circ C = K - 273.15$.$343 \ K - 273.15 = 69.85 \ ^\circ C \ap

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(A) To convert temperature from Kelvin $(K)$ to Celsius $(^\circ C)$,use the formula: $^\circ C = K - 273.15$.$343 \ K - 273.15 = 69.85 \ ^\circ C \approx 70 \ ^\circ C$.To convert Celsius to Fahrenheit $(^\circ F)$,use the formula: $^\circ F = \frac{9}{5}(^\circ C) + 32$.$^\circ F = \frac{9}{5}(70) + 32 = 126 + 32 = 158 \ ^\circ F$.