Step 1 :\(T^{-1}(x)\) is the height above the surface (in kilometers) when the temperature is \(x\) degrees Celsius.
Step 2 :Set \(T(h) = x\) to find \(T^{-1}(x)\), so \(x = 45 - 1.25h\).
Step 3 :Rearrange the equation to solve for \(h\): \(1.25h = 45 - x\).
Step 4 :Solve for \(h\) to get \(T^{-1}(x)\): \(h = \frac{45 - x}{1.25}\).
Step 5 :\(\boxed{T^{-1}(x) = \frac{45 - x}{1.25}}\)
Step 6 :The function \(I\) is not defined in the problem, so we cannot find \(I^{-1}(29)\).