In the presence of an inhibitor, the apparent Km and Vmax are the modified values of the Michaelis constant and maximum reaction velocity, respectively.
The formulas to calculate apparent Km and Vmax are:
\[ K_m^{\text{app}} = K_m \left(1 + \frac{[I]}{K_I}\right) \]
\[ V_{max}^{\text{app}} = \frac{V_{max}}{1 + \frac{[I]}{K_I}} \]
Consider the following details:
Using the formulas:
\[ K_m^{\text{app}} = 10 \left(1 + \frac{5}{2}\right) = 35 \]
\[ V_{max}^{\text{app}} = \frac{100}{1 + \frac{5}{2}} = 28.57 \]