The approximate value of b in the triangle is D. 9.4 units.
From the information, it should be noted that WZY and XWY are similar triangle.
The corresponding ratio will be:
XW/WZ = XY/WY = WY/ZY
The calculation of WZ using Pythagoras will be 7.81.
This will be substituted into the ratio.
b/7.81 = 6/5
5b = 46.86
b = 9.4 units.
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