Final answer:
A decrease of 39.5°F is equivalent to a decrease of approximately 22.22°C. This is calculated using the formula for converting temperature changes from Fahrenheit to Celsius, not for converting individual temperatures from one scale to the other.
Step-by-step explanation:
The question you've asked requires converting a decrease in temperature measured in Fahrenheit to a decrease in Celsius. This relates to the concepts in physics and mathematics. To convert a temperature change from Fahrenheit to Celsius, we use the formula Δ°C = 0.555 × (Δ°F). Here, Δ symbolizes 'change in' temperature. When we plug the 39.5°F temperature drop into our conversion formula, we get Δ°C = 0.555 × (39.5°F), which equals approximately 22.22°C.
Remember, the Fahrenheit and Celsius scales have different zero points and different size degrees, so we should only use the formula for differences or changes in temperature, not for converting a single temperature on one scale to the other.
Learn more about Temperature Conversion