Firefighter Practice Exam

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Using the formula ° F = 9/5 (° C ) + 32, what is 25 ° Celsius in Fahrenheit?

  1. 102.6 °

  2. 77 °

  3. 67.3 °

  4. 59.4 °

The correct answer is: 77 °

To convert Celsius to Fahrenheit using the formula °F = (9/5 × °C) + 32, you start by substituting 25 for °C. First, calculate 9/5 of 25 degrees Celsius: 9/5 × 25 = 45. Next, add 32 to this result: 45 + 32 = 77. Thus, 25 degrees Celsius converts to 77 degrees Fahrenheit. This demonstrates how the values relate through the conversion formula, confirming that the calculation is accurate and the correct answer is indeed 77 °F.

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