Convert `40^@C` to the fahrenheit scale

Explanation

To convert 40°C to the Fahrenheit scale, we will use the formula that relates Celsius and Fahrenheit temperatures:

### Step 1: Write down the conversion formula
The formula to convert Celsius (C) to Fahrenheit (F) is:
\[ F = \frac{9}{5}C + 32 \]

### Step 2: Substitute the Celsius value into the formula
We know that \( C = 40 \) (since we want to convert 40°C). Now, substitute this value into the formula:
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