Recall: μ (micro) means 10^-6.

Capacitive Reactance:

Inductive Reactance X_L= ωL = 50 × 0.6 = 30 Ω

X_L - X_C = 30 - 100 = -70 Ω

Z = 10 - 70j Ω in rectangular form.

Using calculator, |Z| = 70.71 Ω and θ = -81.87°.

So Z = 70.71 ∠ -81.87° Ω

So the magnitude of the impedance is 70.71 Ω and the voltage lags the current by 81.87° (this is the phase difference).