Chances of UNC acceptance

SAT:1850 (3 part- mid 600s in all)
ACT:29 ( I know my test scores blow)
Unweighted GPA: 3.889
Weighted GPA: 4.7401
Rank: 27/450
AP: AP Lang(3), AP Stat (3), AP US History (4), AP Environmental (4), AP Comp, AP Psych
IB: n/a
Senior course load: 2 APs, 3 honors
Awards: AP Scholar with Honor

Extra-circulars: (leadership in parenthesis)
national honors society, varsity tennis team (captain), freshman class council member, sophomore council member (parliamentarian), junior council member (secretary), student body secretary, member of PALS club, attended week long leadership conference
Job/work experience: junior team tennis coach at Millbrook Exchange, child care provider
Volunteer/ community service: ran fundraisers raising $48,000 for NC Food Bank, peer tutoring (2 hours/week) , volunteer YMCA camp high hopes counselor (3 hours/ week)
Essays: UNC- about raising my voice for children struggling to find theirs, common app-(not as good) obstacles junior year transforming me into adulthood
Teacher recs: average from math teacher I’ve had twice, good recommendation from student council advisor for 4 years
Other recs: very good from varsity tennis coach (played with for 4 years)
Counselor rec: probably fairly general
State: NC (in-state)
Ethnicity: white
Gender: female
Legacy: mom attended UNC

UNC has a 4.59 average GPA and a 27-32 ACT range, so your numbers are within the range, and being in-state will definitely help. Unfortunately, legacy status is not considered for in-state applicants.

http://admissions.unc.edu/information-for-parents/