Answer:
City C location: (6,10)
Distance between City A and City C: √313 or 17.69
Explanation:
Use midpoint formula: (x2 + x1)/2, (y2 + y1)/2
Plug in the numbers, this gives you (6,10)
Use distance formula to find distance between City A and City C.
√(x2−x1)^2+(y2−y1)^2
Plug in the numbers, this gives you √313 which is also 17.69