Answer
7 miles
Work Step by Step
Given Central $(0,3)$ and South $(0,-4)$
Use the distance formula:
$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
$d=\sqrt{(0-0)^2+(-4-3)^2}$
$d=\sqrt{(0)^2+(-7)^2}$
$d=\sqrt{0+49}$
$d=\sqrt{49}$
$d=7$
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