9.10.3 Self-Check on Using Formulas

Tick iconExercise 3: Fahrenheit to Celsius

The formula to convert temperatures from Fahrenheit to Celsius is:

Temperature in Celsius equals left parenthesis Temperature in degree cap f negative 32 right parenthesis prefix multiplication of five divided by nine

Using this formula (remember PEDMAS) convert the following temperatures from Fahrenheit to Celsius.

a) 45 ºF

b) -3 ºF

c) 110 ºF

Solutions icon

Answer

a) Temperature in degree cap c equals left parenthesis 45 degree cap f negative 32 right parenthesis prefix multiplication of five divided by nine = 5.6 ºC (to 1 d.p.)

b) Temperature in degree cap c equals left parenthesis three minus degree cap f negative 32 right parenthesis prefix multiplication of five divided by nine = -19.4 ºC (to 1 d.p.)

c) Temperature in degree cap c equals left parenthesis 110 degree cap f negative 32 right parenthesis prefix multiplication of five divided by nine = 43.3 ºC (to 1 d.p.)

9.10.2 Self-Check on Looking for Relationships

9.10.4 Self-Check on Doing and Undoing