A temperature reading of 80 degrees Celsius is equal to:

To convert a temperature from Celsius to Fahrenheit, you can use the formula:

°F = (°C × 9/5) + 32.

Applying this formula to the given temperature of 80 degrees Celsius, the calculation would proceed as follows:

1. Multiply the Celsius temperature by 9: 80 × 9 = 720.
2. Divide that result by 5: 720 ÷ 5 = 144.
3. Add 32 to the result: 144 + 32 = 176.

Therefore, a temperature of 80 degrees Celsius is equal to 176 degrees Fahrenheit, confirming that the correct answer is indeed B. This conversion process is foundational in thermodynamics, particularly in fields where temperature measurement is critical, such as steam engineering, where understanding different temperature scales is essential.