(Refer to Example 1.) Convert the Celsius temperature to an equivalent Fahrenheit temperat...

(Refer to Example 1.) Convert the Celsius temperature to an equivalent Fahrenheit temperature.

25° C

EXAMPLE 1 Converting temperature scales

In the United States, temperature is measured with either the Fahrenheit or the Celsius temperature scale. To convert Fahrenheit degrees F to Celsius degrees C, the formula can be used.

(a) Solve the formula for F to find a formula that converts Celsius degrees to Fahrenheit degrees.

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(b) If the outside temperature is 20°C, find the equivalent Fahrenheit temperature.

Solution

(a) The reciprocal of is , so multiply each side by .

 

The required formula is .

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(b) If C = 20°C, then .