Convert the temperature danger zone limits from Fahrenheit to Celsius. Show your calculations and final values.

40°F ≈ 4.4°C and 140°F = 60°C (calculation shown above).

40°F ≈ 10°C and 140°F ≈ 70°C since rounding to the nearest ten degrees is acceptable for food-safety guidelines when using rough estimates.

40°F ≈ 0°C and 140°F ≈ 100°C because those are the freezing and boiling points used for standard conversions.

40°F = 40°C and 140°F = 140°C because Fahrenheit and Celsius are equivalent for safety ranges in practical terms and need no conversion.