What is the impedance of this circuit?

Impedance Cannot be Directly Measured, We Need to find X_c first.

So,

X_c = 1/2πfC.

X_c = 1/( 2 x 3.14 x 5000 x 0.01 x 10^-6 ).

X_c = 3184.7.

Z = Sqrt( X_c² + R² ).

Z = Sqrt( 3184.7² + 5000² ).

Z = 5928 Ω.