Answer:
87.8 F
Explanation:
The formula for converting from Celsius to Fahrenheit is
[tex]F=\frac{9}{5}C+32[/tex]For our case C = 31 °C and putting that into the above formula gives
[tex]\begin{gathered} F=\frac{9}{5}(31)+32 \\ =87.8F\text{.} \end{gathered}[/tex]Hence, our answer is 87.8F.