Michael J. answered 04/11/16
Tutor
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Effective High School STEM Tutor & CUNY Math Peer Leader
Use the distance formula
d = √[(x1 - x2)2 + (y1 - y2)2]
where:
x1 = 15
x2 = -39
y1 = 8
y2 = -48.1
All you have to do now is plug in these values into the formula.