The coordinates of A are (-6,10) and the coordinates of C are (4,8). We can use the distance formula which is $\sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}$.
So, the distance between A and C is $\sqrt{(4-(-6))^2 + (8-10)^2} = \sqrt{10^2 + (-2)^2} = \sqrt{104}$.
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