Entry Exam Category: High School Equivalency Exams
Course: General Education Development (GED)
Exam: GED Math practice test

Practice Question

A scientist uses the expression 5/9(F - 32) to convert temperatures from degrees Fahrenheit (°F), F, to degrees Celsius (°C). To the nearest degree, what is the temperature, in °F, of a substance at -25°C?

Answer Choices

  • A: 13
  • B: -32
  • C: -13
  • D: 18

Correct Answer: C

Rationale: To convert from Celsius to Fahrenheit, solve the equation C = 5/9(F - 32) for F when C = -25. Multiply both sides by 9/5: -25 * 9/5 = F - 32, so -45 = F - 32, and F = -45 + 32 = -13. To the nearest degree, the answer is -13°F.

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