Question Doreen bought a dress priced at $89 and a skirt priced at $36. She paid a total of $135 for the dress and the
skirt, including sales tax. What was the sales tax rate?

A) 6%
B) 7%
C) 8%
D) 9%

This is a good illustration of what's wrong with trigonometry.  The carpenter has nice exact legs and we're being asked to turn into an inexact angle by a weirdly notated function that looks like a reciprocal but isn't.

Never mind.   Tangent is opposite over adjacent, which here is riser over tread,

 C. arctan(6/11)