You perform a titration between Sodium Hydroxide (NaOH) and Hydrochloric Acid (HCl). NaOH is in the burette and the HCl is in the Erlenmeyer Flask. 41.8 mL of 0.5 M NaOH was added to 37mL of HCl, what is the concentration of the HCl? Give your answer to 2 decimal places.