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| Write a function distance(x1, y1, x2, y2) that returns the distance between points (x1; y1) and (x2; y2). If you do not remember the formula for the distance between two Cartesian points, you may google it. You may assume that the function you are writing is part of a larger program where the math module has already been imported. distance(0, 0, 1, 0) → 1.0 distance(0, 3, 4, 0) → 5.0 distance(13, 1, 1, -4) → 13.0 ...Save, Compile, Run (ctrl-enter) | 
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