Certified Nurses Operating Room (CNOR) Practice Exam

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How do you convert Celsius to Fahrenheit?

Multiply by 2 then add 30
Multiply by 1.8 then add 32
Add 32 then multiply by 1.8
Subtract 32 then divide by 1.8

The correct answer is: Multiply by 1.8 then add 32

To convert Celsius to Fahrenheit accurately, you multiply the Celsius temperature by 1.8 (or 9/5) and then add 32. This method effectively accounts for the difference in the size of the units of temperature between the two scales. The initial multiplication by 1.8 adjusts the value of the Celsius temperature to align it with the Fahrenheit scale's progression, and adding 32 shifts the resulting value upward to correspond with the point at which water freezes (32°F) on the Fahrenheit scale, as this is an essential reference point. For example, if you take 0°C, multiplying by 1.8 gives you 0, and then adding 32 results in 32°F, which accurately reflects the freezing point of water. Thus, this formula is essential for converting any Celsius temperature to its Fahrenheit equivalent accurately.