ANSWER
[tex]\begin{equation*} -13.7\degree C \end{equation*}[/tex]EXPLANATION
The high-temperature forecast is 7.4°F.
To convert this to degree Celsius, apply the formula:
[tex]C=\frac{5}{9}(F-32)[/tex]where C = temperature in degrees Celsius
F = temperature in degrees Fahrenheit
Therefore, the temperature in degrees Celsius is:
[tex]\begin{gathered} C=\frac{5}{9}(7.4-32) \\ \\ C=\frac{5}{9}*(-24.6) \\ \\ C=-13.7\degree C \end{gathered}[/tex]That is the answer.