Final answer:
To convert the child's fever temperature from Fahrenheit to Celsius, the formula C = (F - 32) × 5/9 is used, resulting in a temperature of 38°C.
Step-by-step explanation:
The question asks to convert a fever temperature of 100.4°F to Celsius (°C). The formula to convert Fahrenheit to Celsius is C = (F - 32) × 5/9. Applying this formula:
C = (100.4 - 32) × 5/9
C = (68.4) × 5/9
C = 342 × 1/9
C = 38°C
Therefore, the child's temp in °C is 38°C.