To convert 18 degrees Celsius to Fahrenheit, you can use the formula:
F = (C × 9/5) + 32
So, by substituting 18 for C:
F = (18 × 9/5) + 32
First, multiply 18 by 9/5, which is 32.4:
F = 32.4 + 32
This gives us:
F = 64.4
Therefore, 18 degrees Celsius is equal to 64.4 degrees Fahrenheit.