Praxis Core Academic Skills for Educators: Mathematics (5733)Number and QuantityMedium
A technician is calibrating a sensor that measures temperature. The sensor's reading is 2.5 degrees Celsius, but it needs to be converted to Fahrenheit. The formula for conversion is F = (9/5)C + 32. What is the temperature in Fahrenheit?
- A37 °F
- B38.5 °F
- C36.5 °F
- D34.5 °F
Show answer & explanationAnswer & explanation
Correct answer: A. 37 °F
Substitute the Celsius temperature into the given formula and follow the order of operations to calculate the Fahrenheit temperature.
Why the other options are wrong
- B. Incorrect calculation, possibly by an arithmetic error.
- C. Incorrect calculation, possibly by using 5/9 instead of 9/5.
- D. Incorrect calculation, possibly by adding 32 before multiplying (9/5)C.
Temperature Conversion (C to F)
To convert a temperature from Celsius to Fahrenheit, use the formula F = (9/5)C + 32. Multiply the Celsius temperature by 9/5, then add 32.
- C represents Celsius temperature, F represents Fahrenheit temperature.
- The fraction 9/5 can also be written as 1.8.
- Always perform multiplication before addition according to order of operations.
Memory trick: Celsius goes to Fahrenheit, multiply then add.