#### Convert 40 degrees Fahrenheit into Celsius.

a. -40°C

b. 4°C

c. 104°C

d. 10°C

**Answer:**

To roughly convert 40 degrees Fahrenheit to Celsius, you use the formula °C = 0.555 x (°F – 32). Substituting 40 degrees Fahrenheit into this formula results in approximately 4.44°C. The closest option to this approximation is b. 4°C.

**Explanation:**

The subject of your question falls under the category of Mathematics, specifically the section that involves conversion of temperature units. To convert degrees Fahrenheit to Celsius, you use the formula °C = 0.555 x (°F – 32). So, if we want to convert 40 degrees Fahrenheit into Celsius, we would substitute 40 into the formula. This gives us °C = 0.555 x (40 – 32), which simplifies to °C = 0.555 x 8. Therefore, 40° Fahrenheit is approximately 4.44° Celsius, which isn’t identical but is closest to option b. 4°C.

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