To solve this use Pythagorean Theorem (a²+b²=c²)
(13-(-5))²+(24-11)²=c²
18²+13²=c²
324+169=c²
493=c²
So the answer is the square root of 493
and that rounded to 2 decimals is 22.20
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Distance2 = (21-9)2 + (16-11)2 = 169 and the square root of this is the distance which is 13 units
If you mean points of (4, 5) and (10, 13) then the distance works out as 10
Points: (2, 1) and (14, 6) Distance: 13
10 units
about 13 miles