To find the initial value, we need to evaluate the temperature at the starting point, which is when \( x = 0 \) hours after noon.
Given the equation for temperature:
\[ T(x) = 2x + 10 \]
When \( x = 0 \):
\[ T(0) = 2(0) + 10 = 0 + 10 = 10 \]
Therefore, the initial value (the temperature at noon) is:
10°C