Question

To convert the average temperature in Helsinki, Finland from degrees Celsius (C) to degrees Fahrenheit, which expression should you use?

A) 5C + 32
B) 9C + 32
C) (C + 160)/5
D) (C - 32)/5

Answer 1

To convert the average temperature from Celsius to Fahrenheit, the correct formula is (C × 9/5) + 32. This accounts for the scale difference and the freezing point's offset between the two temperature scales.

Step-by-step explanation:

To convert the average temperature in Helsinki, Finland from degrees Celsius (C) to degrees Fahrenheit (F), the correct expression to use is option C) (C × 9/5) + 32. This is because the relationship between the Celsius scale and the Fahrenheit scale is defined by this formula: degrees Fahrenheit (F) = × (degrees Celsius (C) × 9/5) + 32.

When converting temperatures, it's important to remember that while the freezing point of water is 0°C, it is 32°F on the Fahrenheit scale. Therefore, after multiplying the Celsius temperature by the ratio of 9/5 (or 1.8), which accounts for the difference in scale, you must also add 32 to adjust for the freezing point's offset.