The answer is 11..and there's a pic for u too...my pleasure helping you
3. Both are supplementary to angle BCE
4. Angle 2 = Angle 1
56.6 - 3.2 = 53.4
53.4 / 2 = 26.7
26.7 - 6 = 20.7ml
For the final answer she has 20.7ml of solution left.
Please mark as brainliest if you can