NaOH is the titrant, so it's in the burette.
To know the volume of NaOH, we need to subtract the final volume of the buret reading by the initial volume:
30.00 - 0.35 = 29.65 mL
Answer: 29.65 mL of NaOH.
To find the volume in L we just divide 29.65 mL by 1000:
0.02965 L
Because 1000 mL = 1L
Answer: 0.02965 L
