Answer to Question #54288 in MatLAB | Mathematica | MathCAD | Maple for anna

Question #54288

Two measurements of the height of a tall tree are made by two groups of botanists. The first group measures the height to be 31.3 m with an uncertainty of 0.7 m. The second group uses a different method and measures the height to be 33.3 m with an uncertainty of 9.9 m.
What is the |t'| value for this pair of measurements?

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