Question: McCarrs Creek, New South Wales is at the headwaters of a semi–mature tide located about how far  north of the Sydney central business district
Sentence (from "McCarrs Creek, New South Wales"): McCarrs Creek is a suburb that is located adjacent to McCarrs Creek, approximately 4 km west of Newport, at the headwaters of the Pittwater in northern Sydney, in the state of New South Wales, Australia.
Relevant evidence: Yes