30 students
14 have no siblings
that leaves 16 with siblings
6 have brothers and 12 have sisters which = 18 so 2 of the students have both a brother and a sister
2/30 students have a brother and a sister
1/15 chance
Distance =

so plug in the coordinates and you will get 14.14 units
Answer:
The answer is: y = - |x+1|+1
Use this equation: A=3.14159r^2